Questioning my role in ABDL

Hi! So I’ve been part of the ABDL community both online and been indulging at home for a few years now. When I was younger (around 18-19ish), I believed I was a switch but decided I was just a sub/little when I was around 20 or 21. Lately, I’ve been rethinking that. One of the reasons I stopped considering myself a switch was because I didn’t feel confident enough in myself to be a dominant/mommy. I was early in my transition (I’m a trans woman) and I didn’t know a whole lot at the time. Now I’ve been on hormones for nearly half a decade and have done a lot of work to boost my self confidence. I say all this to ask this. I need recommendations on readings. Any book recs or really just any recommendations on where to start in general. Like I understand the whole little/sub side, it’s just the dominant side I have no experience in.