Hi Jake!
I think it's awesome that you want to profess your faith in a very public manner. I wish you all the best in what you decide..
I wanted to give you a slightly different view on this subject to consider as well. I am a gal, and just speaking for myself personally, I currently do not wear any kind of clothing, jewelry, or have bumper stickers or symbols on my car, etc. that showcase my faith. This is a personal decision I made with much prayer due to the way God seems to bring people to me.
I know some will say I'm not a a real Christian for this, but throughout my life, even at summer camp when I was about 11, God has always seems to connect me with people who have gone through abuse, usually sexual, and almost always starting in childhood.
No matter where I went or what I did (one time I was home alone back in the days of cord phones, and a wrong number call to our house led to a 90-minute conversation about some very personal problems the caller was going through,) people would pour their hearts out to me about how their innocence had been betrayed in the worst way. Many times, the people who abused them claimed to be Christians, often pastors, others who worked in ministry, or parents who would use their own children for nefarious purposes throughout the week, then raise their hands in public worship every Sunday.
I will always remember one woman I talked to who was especially beautiful even from the time she was a child, and unfortunately, men took notice. Starting from when she was a toddler to the time she was a young adult, her abusers included two pastors, a police officer, and a coach (and those were just the ones she told me about.)
And it's definitely not just women. I got to a point where almost as many men were talking about their stories as women. When trying to research how i could effectively answer such heartfelt stories of pain and bitterness, I came across an article I will never forget.
It reported the story of a man in his 40's who had been repeatedly abused by a priest, from his boyhood through his young adulthood. He said his most vivid memory was of the glittering gold cross around the priest's neck flickering in the light, every time the priest abused him. For this man, the cross became a symbol of horror and dehumanization rather than God's love. I have also often heard/read that such abusers will often tell their young victims, "This is how God wants you to express love."
I had a very long talk with God about this. Having people tell me about their abusive backgrounds became so common for me that I would get sharp, shooting pains through my stomach, and when it happened, I knew it was God telling me, "Pray up, because I'm sending you another one soon."
Because of this, I asked God if it was ok, I wasn't going to wear any symbols of my faith because I wanted every person I met to see me as a blank slate. We all have certain symbols and/or words that trigger us, and since God often sends me people who were sexually abused by those claiming to be Christians, I didn't want to be seen as an automatic reminder just because of an outer display. Rather, I had the hope that they would get to know me as any other person and I'd just see where God led the conversations. Now this isn't an absolute. At one time, I had "In God We Trust" on my license plate and I regularly carried a Bible or devotionals to many of my jobs to read during breaks. But at other times, I just feel I am not supposed to, for example, wear a cross necklace because it might discourage someone from talking to me. I just try my best to pray regularly and follow God's lead. I always remember Esther, whom God used to save her people by going somewhat incognito with her faith until it was the right time to reveal it.
The reason I'm mentioning this is because I think it's awesome that you want to wear faith-filled shirts, but I also hope you don't get discouraged if you encounter any pushbacks. We all know the saying, "You might be the only Jesus someone has ever met." But if you meet someone whose only experience with Christians were abusers who justified their actions? You can see why some people might very wary of anyone wanting to talk to you about God in any way, so please don't take it to heart if that happens. Sure, some people might just be all out non-believers who aren't interested, but some might just need a little extra grace.
This might just be me, but usually the people I encounter who are most bitter about the subject of God are those who were abused by those claiming to know God, or felt that God let them down ("Why didn't He stop it from happening?")
God usually puts me in situations where I'll be encountering the person regularly (work, school, small groups, etc.,) so my own first order of business is usually concentrating on letting them get it all out and digging up the root cause of their pain and anger. I know your situation might be very different if you're just out and about, but I'm sure God will lead you in what to do.
I often felt very discouraged that nothing seemed to change, or maybe the person would come to church for a while, but then stop. However, God taught me that everyone is in a progression. It might take 30 more steps and meeting 10 more people before that person is ready to truly know Christ, or maybe they never will, but the important part is that we listened to God and did as He asked in that place. I might not be the one to lead that person into making that crucial decision to give their life to Christ, but if God called me to help get them from Step #3 to Step #4 or even to Step #3 1/2, then at least know I did what I could.
Likewise, maybe if you're wearing a t-shirt that mentions Jesus, it might be Step #2 (planting a seed in their mind when they see it) out of many, many more, but you have completed the task God sent you to do.
Even if the person is angry, maybe it's God's way of reminding them that He is still there, and He isn't going away.
Anyway... I was just hoping to encourage you whatever you decide, but most especially if you experience any negative reactions.
No matter what happens, God is using you to make a positive difference, just like on this forum!
God bless you and please keep us posted on how it goes.