Sadly, no such events exist. From experience, most AB/DL related events are about networking and making friendships, they are not about having your fantasies fulfilled (although there may be some exceptions to the rule). It is possible for you to meet caregivers at AB/DL events, but also from experience, many of them are already taken or they'll want to get to know you better before engaging in a Baby/Caregiver dynamic with you. This isn't to say that you shouldn't attend AB/DL events just because they don't entail something more interactive/hands-on, I have met quite a few padded friends at local AB/DL events and as a result of these friendships, I've had a few playdates and padded sleepovers, it's not quite a caregiver/baby dynamic, but it's fun nonetheless.
As Trevor has said, your best bet in finding the type of interaction and relationship you seek, would be to form meaningful relationships/friendships with other people, people within the AB/DL community or outside of it. These types of relationships don't happen overnight, if you meet the right person and build trust and rapport then you'll have a relationship that is more in line with what you desire, there really is no rushing into something like that.
Also, the only thing remotely close to what you are seeking would be to visit a professional AB/DL nursery, but your chances of doing so may be slim depending on your location and finances. AB/DL nurseries are not a readily available thing, they exist in certain locations only and the professional caregivers there usually charge an arm and a leg for their services, they aren't really something a young, newly exploring AB is going to be able to take advantage of.