Two years ago I was in a similar position, except I chose Roman Catholicism.
I was considering joining a Protestant religion, because some of them really have no concrete beliefs other than if you give them money every year and you believe in Jesus, you'll be "saved."
If you're going to be serious about religion, don't join a watered down sect just because it has fewer rules. If you truly have faith in Christianity, you must accept it in its entirety, not just the rules that suit you. The reason I chose Roman Catholicism is, like you, I "felt Jesus" and though I thought about joining Protestant churches, I realized it made the most sense to join the Catholic Church since it's the one that Christ himself started. The rest were all started by mere men.
You will see people who call themselves Christian, but don't even follow the rules of the religion they claim to believe in. This is wrong and is exactly the way you should NOT act. That doesn't mean you can't sin ever, but if you do, you have to acknowledge it is wrong through confession and do your best not to sin again.
Ask yourself if you really believe in God and what He says. If you are not willing to accept Christianity as "the whole truth and nothing but the truth," you're better off holding off your conversion if you're not completely serious about it.
As for the questions in your first post, masturbation and pornography are sins. If you're going to become a Christian, those need to stop (though if you're committed to stopping and fall along the way, you can always go to confession).
Listening to metal is fine.
Dress has to be modest. If you're a guy, you probably won't run into problems here really, unless you walk around in your underwear all the time or something. Girls shouldn't wear things like miniskirts and tops that show lots of cleavage and things like that in their day to day life. Basically, try not to wear something that's specially designed to arouse someone.
If you want to read more about it, give the following link a try.