First time filing taxes. Questions!

I'm 19 years old and I know absolutely nothing about taxes. I didn't file last year because I was on my own and was just as clueless. My first questions is would I need w2s from every job I've ever had? Like even before I turned 18? I have all of mine from the past 2 years. Second question is how do I even file them?? Where do I go and what will I need? Thank you so much to anybody that choses to help me out!!