Big girl advice! ☺

Queens
Hey wonderful people!! 
I am a big girl (250+) I have come more comfortable with my body and accepted who I am and what curves I got! 
My AMAZING supportive partner is a big girl lover but he's tiny!! (160ish?)  He's been more than supportive about trying new positions that we both haven't tried but I need help!
We have tried the basic positions during sex but they are getting old and boring. I want to try to expand and try new hot things with him! Any suggestions? 
-Thanks!