Okay so I'm not yet very comfortable with fingering myself and I do the pillow-humping method...but I feel like I've never orgasmed? I read descriptions of having an orgasm (vagina having a seizure, you can't help but moan, feels super super good, etc) but I haven't felt any of it?

The closest I get is feeling a slight relaxation and sometimes my eyes roll back.

Any idea what's going on? Or any tips?

(I'm 16 btw, I don't know if that helps)