I'm going to start by saying that majority of your questions can not be answered by anyone, but yourself. Even those that are in the same boat as you can not answer. We all have different experiences, different relationships with God, different levels of understanding, different interpretations and because of those differences there is no definite answer to a lot of questions you may have. I know majority of the questions I have posed about my sexuality to other Christians(not necessarily on this site) have been avoided. The reason is they can't answer them. They don't understand my position and claim my understanding or lack thereof is twisting of Scripture.
However, the first question you posed has only one right answer and that is that it is not wrong to worship God. Any person, no matter what age, race, gender, sexual orientation, or sin they may have can worship God. God knows what is in the hearts of each of us. He knows whether we worship for real or for show. NEVER let anyone say you can not worship God. Whatever reason they may give for why you can not they will always be wrong.
You need to understand something. Any person that is apart of the LGBT community(especially those that identify as Christian) have repeatedly heard these verses over and over again. At this point you can expect one of the above to arise just at the mention of the word gay, lesbian, or homosexual, especially Leviticus verse because people just love the word abomination. Although, I am confused as to how Deuteronomy 22:5 condemns homosexuality. Maybe drag, but not a partnership of two men or women. What about kilts though? I don't care what you call it, but a skirt is a skirt. Are all Scottish men who wear kilts abominations? Even if it is a more masculine version of a skirt, it stills pertains to a woman does it not? Also, does the Bible say I can't like things that are typically associated with a woman or that I have to like things typically associated with a man? For example, I love shoes, shopping, and clothes. I hate sports and cars. To be perfectly honest I know nothing about cars and as for sports I barely get the basics. Let's just say I would rather be shopping.
What if you never begin the act? I've never been with man or woman, but I haven't changed. If the act is the sin then why when I have not sinned(only talking about gay sex) not been freed? It's not as simple as stopping the act or never starting. It's much deeper than that.
I'm not sure if this was deliberate or accidental, but when delivering 1 Corinthians 6:9-10, it is best to include verse 11 as well. Without verse 11 you are blatantly stating she will not get into Heaven. We are all unrighteous and we all fall short of the glory of God and that is why verse 11 is so important.
1 Corinthians 6:11 (KJV)
11 And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God.
Why do you assume we lack faith in God? I don't speak for everyone, but I hope that one day I can wake up and not be attracted to men, but until that day do I have to go through life hating myself? If I have to I will. If depression and thoughts of suicide will stop me being gay then I will do it. You really don't understand what I'd do or give away to not be this way.