Riding a man

I feel weird for asking this but I’m a plus size woman and I have insecurities about getting on top. I’m 25 and I’ve only been with one guy for about 3 years and with him I did get on top and he said I was good at it but I’m now in a new relationship and so I feel that I don’t have enough validation that I’m good at it.. if that makes sense lol so does anyone have any tips or advice that could me out? Suppose to meet with him next month and so I want to be prepared