New to femdom, looking for advices

Hi everyone, my LDR bf of 3 years sometimes asks me to dominate him in bed, and i wonder what could I possibly do to him? Usually im the sub (we never had sex though, just oral and hand stuff), so I'm confused how should the things play out.

I'm really shy and its hard for me to initiate things, dont know how to start or what to do after. He doesn't really know what he wants either.

We talked about his boundaries and he doesn't want any toys or straps to be used. Especially when it comes to ass play, only my fingers. Pain or degradation is a turn off for him. He doesn't have sensitive nipples, isn't vocal, no expressions (he's so hard to read).

All i can think about is maybe some foot worship, cuz he's into it, tying him up, blindfolds or edging. He's pretty much vanilla, compared to my kinks.

Maybe some sensory deprivation would help him become more sensitive or locking him in a chastity cage? I kinda wanna break him a little, but in a nice and not neccessary harmful way, cuz he still is my baby and if he doesn't feel good, i won't either.

Anyone have any ideas?