This is a difficult question because, to a large extent, it can only be answered by you. Speaking for myself, I started (as you have) by considering the scents that I've enjoyed in the past, and then asked myself why I liked them. Then I tried to do a lot of reading on here about the "notes" that they contained. Pretty soon, I was ordering samples of certain ones from theperfumedcourt.com (which can be expensive...maybe too much so, given your age).
In any case, after doing a lot of smelling, you begin to get a feel for WHAT YOU WANT FRAGRANCE TO SAY ABOUT YOU. WHAT IMPRESSION YOU ARE TRYING TO LEAVE. In my case, I want to be a little provacative. I always tend toward the "stench" of Musc Ravageur or Muscs Koublai Khan. Even though I am a rather traditional, bow-tie wearing guy, my alter ego is a sexual beast who is confident and comfortable in every situation. Rather, this is what I WANT to be, and thus, to a great extent, who I am.
I have tried virtually all of the Bvlgari scents. Every one of them smells so damn good! But for me, that's the problem. I want fragrance to say about me what I dare not say about myself: that...deep down...I am interesting, daring, sexy, and off-beat.
So....I say all that to say, the whole thing is a major journey in self-discovery where fragrance is concerned. Good luck!