I was 20. My first time was with this girl I'd met through an online app (cringe). We'd been on two or three 'dates', then got together. It was actually a very nice experience and super exciting, too. It further confirmed my feelings of non-straightness I'm now 22. I suppose I'm one of those lesbians who realised slightly later on in my life.
I was 11. I played around with neighbor boys. I actually had sex (including anal sex) before learning to masturbate. That's not a common experience according to what I've seen here on EC.