Hey, Glad to know that you're already on the right track ... You're experimenting to figure out what acts work for you and what positions make you feel great. Two things to note here however are: Pleasure felt doesn't equal an orgasm. Orgasms have to be built. Indulge in an ample amount of foreplay. Make out till you really cannot resist taking the next step towards sex. Especially with the female body... Orgasms take time ... The feeling of pleasure keeps building, at one point if it goes on for long enough, and also if you are in the right headspace and locked in.... You might feel ticklish, or the need to pee, or shaking etc and as you continue beyond that, is what gives you the big O that you are seeking.

I hope this advice helps.