I’ve found it useful to find out who is knowledgeable on what it is I’m interested in but either classes are sporadic or don’t match my schedule, then talk to them. In one case, they’d had interest from another couple folks as well, so they put together a class at a time where we all could do it.
In another couple cases, I got in the basics class but need mentorship, so found out who was knowledgeable and receptive to getting pestered with beginner questions
and kinda when they tend to be at the space and show up then too, or actually communicate/coordinate, when they plan on coming but would be flexible to help mentor as well. I try to also do as much independent knowledge building (YouTube videos, Internet sites) so that when I have a project and a go-to person, I can make the most of our time.
Depending on subject, SIG meetings (special interest groups) are good to make connections at. You mentioned leather. It’s got a monthly SIG. There’s others (I schedule a Fiberarts SIG 1-2x month). And look and see who is teaching classes in your area of interest and track down those teachers. They can give you a nudge in the right direction.
Also just ask here on Talk who to contact with what subject and someone will know. Also you’ll start finding a few go-to folks that have been around a long time that usually know who to start with on a subject. Also on the committee lists, there’s the chairs that will be a good start and know who might be good in what or what their schedule tends to be.
I’ve been at DMS about 1.5 years and it took awhile to figure out how to navigate. Main thing is just don’t be shy about asking around. Most folks are super helpful and if they don’t know, they might can give a push in the right direction. And be patient and don’t get in a hurry, because it can take awhile to ferret out information, then coordinate with folks that have inclination and similar schedules.
In the meantime, the best advice is just spend time at the space getting to know folks. The rest will follow once you start asking around. Now that I know a few folks, plus posting here on Talk, I can usually get help, answers, mentorship, etc in a few days of checking around.