how to feel comfortable and get off

I'm 16 and maybe a year ago was the first time I started getting horny. I'm not sure whether this is because I'm a late bloomer in that department or if all the porn I saw was straight (since then realized I was a lesbian.) In short, my experimental teenage years were misguided and I have to in a sense have another one. I've had so many opportunities to have sex with a girl. The issue is I don't even know how to feel comfortable masturbating. If I touch myself the feeling goes away, it doesn't intensify. I know I WANT sex because I want to, pardon my language, fuck girls but I don't know how to actually get off. If there are any tips you can offer it would mean the world.