Sex positions for the inflexible?

Hello all,

I want to try new positions other than missionary, doggy style, and the one where you lay on your side and lift your top leg up until your legs are in an L (only way I can describe it. I don’t know the name).

I ride sometimes but I don’t have Megan the Stallion knees.

Sex is starting to come predictable and I wanted to switch things up.

Can anyone give me some new positions to try