Need advice; sex life

Hi everyone, I’m looking for some advice and hoping to hear from people who might have experience with this.

My (24f) partner (27m) is not circumcised, and I’ve noticed that when I’m grinding on top, sometimes the skin gets pulled back too much and it causes him discomfort or pain. I definitely don’t want to hurt him, so I’m trying to figure out if there’s a better way to move or position myself to avoid that happening. Is there a specific angle, rhythm, or technique that works better with an uncircumcised partner? Since I wanna be on-top and please him more

And I wanna give him bj more but the issue is that he is not really hygienic about it and I've been telling him to wash it first before I give him but the smell still didn't go away.

Also, when I try to do cowgirl, He’s much bigger than me, I'm short and my knees don’t fully reach the bed when I’m on top, so it feels unstable. Are there alternative on-top positions that might work better for someone smaller? Or ways to adjust cowgirl so it’s more comfortable and balanced?

TL;DR

Any advice, positioning tips, or general guidance would be really appreciated. Thank you!