Learning Femdom

Hey everyone!
So I (24F) have a new boyfriend (24M).
So far we have pretty much mostly dabbled in me being a bratty sub and him being the brat tamer and turning me into a sweet little toy.

But now we’ve talked a little more.
were both bisexual and he is incredibly versatile in his interests and the roles he can take on in bed or in scenes.

A few days ago he told me about/ showed me pictures and videos of him crossdressing and pleasuring himself anally with toys while wearing a chastity cage.

I am so happy that he feels safe enough for me to be the first person he told about this and I love him more than anything!

We’ve already talked about scenarios where we could implement the chastity cage and stuff.
Now, I’m curious to learn more about how I could learn to become more dominant, because apparently he likes the humiliation of it all and he likes to be degraded.
I only have experience being on the receiving end of such behaviour.

Any advice would help :)