Congratulations! Sounds like you’re at the start of a great journey.
I only speak from experience of my relationship with my other half. I told her of my submissive desires slowly and tried to add the odd toy / restraint in. She seemed to be game for it so we experimented a bit more slowly but surely mainly myself suggesting things. The other option would’ve been me to sit down with her and say I really want to try all of these things, what do you think? But that wasn’t going to happen. I’d been single a long time, we were only been together for a few months and we are both naturally quite shy.
My only real tips is to make sure you walk before you can run and really try and think about one or two things which in your mind really turn you on and try baby steps towards that. For instance the idea of my OH really humiliating me turns me on but I know that’s unlikely to happen so I’ve gently asked if she’d be comfortable with occasionally speaking down to me etc which she says she enjoys.
Practically I’d suggest looking on LH with her (or if she wants you to surprise her) look on your own at a few outfits with a BDSM twist you think she’d look good in. Although obviously you don’t need the clothes to be dominant.
Beyond all feel really lucky you’ve found a partner willing to embrace your submissive side and even if she won’t go as far as in your mind you’d want her to, just be grateful she’s going further than a lot of people would (and no judgment made against those who don’t want to embrace this side).
Just a final thing. There’s a lot or talk about aftercare for the submissive which is obviously important but after we play I always really focus on her and make sure she’s ok and explain how amazing she was, how beautiful she looked and how grateful I am. And I try and make sure I only make the kinky sex every so often so she gets her vanilla fill too.