No one can really tell you your type through a relatively simple conversation via text. I've figured out I was an INTP at 14.I'm not an INTP, I am extroverted. I'm 16. I don't know if Ti is a function I use except when I really need to think about something intricate like the MBTI system and even then it seems noting like the things I'm getting from the types. I know you said you were 22 when you figured it out, but I need it. I really just want to figure out my life and why I feel the way do.
My personal favorite method is taking an absurd amount of long quizzes from a variety of websites, reading the profiles and doing a bunch of research. If you're not an xNTP though... probably won't be nearly as much fun for you. Also there are quizes to score your functions. So far I've found that Ti and Te are the hardest to identify and articulate.
Figuring out your MBTI type won't answer your questions, and it's natural for people to try and fit the label they perceive themselves as- which would effictively undermine what you are trying to accomplish.
MBTI has a lot of grey area and is not psychology's forerunner in personality theory. So take everthing with a grain of salt.