Hi,
If your current church home has a youth ministry, become involved in it fully, moreso that you are already. In other words, be willing to take extra time to do Bible studies on your own and then, after you've worked through one (or some) that you feel would speak positively to your peers, meet with your youth pastors and let them know that you'd like to start a Bible study with your peers on a night where there isn't service or youth already occurring. You can have these studies at homes or at restaurants, though I think restaurants tend to stifle Holy Spirit moving as you can't exactly let loose and worship.
Use social media like Facebook and Twitter to put out Scriptures and revelations Christ has given you. You can also write a blog, which is helpful.
Find out the rules at your school regarding groups and clubs and work to start a Bible Club on your campus. Us adults do not have a tenth of the access the students have to do things like this. Take advantage.
Finally, don't rush. Take your time and listen to God and don't get frustrated. God spoke to me regarding His call in my life about Radical Purity when I was in my early twenties and four years ago I was prophesized over that I would have a following of young ladies. This hasn't happened yet, but I hold strongly to the call and purpose God has placed on my life, not just with this ministry but with other things as well. Remember, our timing isn't His timing and sometimes when doors don't open quickly enough, we give up. Cling to the promises and the call through any waiting that may be before you.
Study His word and allow it to be written upon your heart. Be very careful about stating your opinion as fact. Remember that we are first called to love. Love your peers. Love those younger than you. Love and respect and honor those older than you. Be willing to be counseled and corrected. Keep your heart soft, pliable and teachable. Keep your focus on Christ and be available to be used by Him in a moments notice.
Pray without ceasing. May Jesus always be in your thoughts and on your mind.
Worship alone and with your church and peers. Worship in good times and bad. Worship even when you don't 'feel' like it. Worship is pivotal.
Lastly, keep your mind on things pure and honest and holy and righteous. If you are going to teach and lead your peers, this means that you need to hold your life to a higher standard than those around you. Be very selective about media in your life (books, songs, movies, t.v. shows, etc.) and be guarded about how and where you spend your time. Be sure to think before speaking and to try to keep yourself from ranting and raving when upset (this is the hard one for me
but God is ever faithful).
And, most importantly, remember that you are human and will make mistakes. Be willing to admit them and face them. Do not let pride rule you. And, in knowing this, be merciful and compassionate to those you're teaching and leading, understanding that they, too, are human and will make mistakes.
Feel free to pm me any time and I'll try to respond quickly.
May Jesus bless you and anoint you to do His will.