Perhaps the motivation is not about to go to Church, is in faith itself, the thing of going to the building that doesn't make you a saint or either be saved, no, in my personal opinion is what you do EVERYDAY, not just one day, not just SUNDAYS, no, is how you treat your mind, your soul, your body, all the time, how you behave with your family, if you go on Sundays but all week act as a ***** to all around you..... don't go please.
If is boring the Bible is because you are not making ANY EFFORT AT ALL to understand, what I found funny is that you are afraid of going to hell, but you don't believe, you don't know how to see every day's miracles but you are afraid...
There's no age to go through confirmation, so if you really care and want to do it, you still can.
Praying is a way to communicate with God, but if somebody has to push you, oh boy... well, then what do you want? a free pass to where.... if you haven't read anything or even you are not interested to read the Bible, why are you afraid? perhaps, the only I could say to you is what you could miss, ...... HEAVEN.
Religion is not fanaticism, nothing more far from that, is faith, that is what you need to take out and make it grow.
Christian morals as you said "Modesty".... is just not to be a stupid person bragging about something, if you have a talent use it, don't brag about it. The perception that you have about that concept, I think is incorrect.
For your 15 years... what do you really know about homosexuality? your attitude is arrogant, you can't support nothing if you are not in the knowledge, remember that never stops, I can't say either "ah, I know all..." no, I would commit the same mistake than you, no, there's always something to learn, perhaps I have another point of view with 16 years more than you, just that, I could be wrong too.
About "people should have sex when they feel the moment is right..." yes I should add to with the right protection both partners, in order to avoid further problems. The word be responsible is BIG as you can imagine and the consequences the same.
If you used to love going to church, maybe something or someone disappointed you, but that doesn't mean you have to stop believing.
Life itself is a miracle, open your eyes and see all around you. Faith is not to be afraid, read between lines, God wants you to be a useful person, one with a heart, with a brain and a happy life, that's all.
hell could be this, no faith, only fear, heaven could be a life full of happiness, here and only here, perhaps there is no place to go, everything that we do we'll pay our bad deeds here...