sex helpp lolol

So me and this kid dated last year for a few months we broke up and we never had sex but we did everything else. Tbh hes not the best looking and thats not what i look for first in a guy he makes me feel like a princess nevermind that. Were getting back together and were both older now and things will escalate. Hes a bigger guy not that it matter but what positions are recommended for a heavier guy. And i dont want to make him insecure or anything you knoww!