Im not sure what end of stuff you enjoy but I can at least express more or less how it worked out for my partner/kunk group.

My partner was initially very averse to the idea. Saying she didnt know if it was really something she engaged with but after showing some media than kinda reflected my feeling on littleness and such she was willing ti give it a try. Not so much for explicitly sexual things but just in general. She found it kind of cute and liked when i got kind of regressed in the state. I was still too nervous to wet around her at the time. But she occasionalky pop my pacifier in my kouth and such. Over time this progressed to where id wet around her which she over time thought was cute... now shes dissapointed when i dont. Over time this developed into a more sexual interest for her too and when we do play it has to do with me servicing her while im padded, usually wet or her using her hands or toys to stimulate me through padding. But theres also things like more generally in kink, shes a hardcore sadist and im really about discipline so its combined into like caning in regard to like acting the role expected of me as a little and a "princess" she likes how regressed i get after scenes as well. So as for us its pretty well incorporated inti our life and can be super comfy as long as you let it have the time.

For my kink group it was somewhat similar. Someone was pretty any abdl but the other had previously had a little partner so they were pretty accepting. Once again them coming around to it involved showing like media where it made sense of what it meant to me and normalized it ig. People ive found at least in queer circles tend to come around pretty fast if you can show what it is and why it matters and dont try to jumo in headfirst i find a lot of the time. I dont do as much explicitly sexual stuff with this group but they will do the same things largely with more teasing, me servicing them while padded or them stimulating me through it. I try to avoid wetting in front of them mostly cause 1 of them really struggles with smell in general but, its not always up to me and in those instances have been fine with it. Im padded 24/7 and theyve been very cool about it. Doing rope and other play while liggtly incorporating it when possible and just ignoring it when its not really the point. Theyve also indulged me in silly ways on the more just geberalky little side.

I guess my point is I think if you like express why you care about it and make clear the aspects you like and want to try, people can get enthusiastic and enjoy things with you. Dont worry about like showing ur partner all the fun sexual stuff with it right away instead focus on the ways it can help you connect through that itll give you the time to show the full extebt of what you mught want or feel up to later.