Welcome, Bluebird1977! I won't discourage you from looking for in-person BPD support groups, though they may be hard to find. This site and the message boards have been a fantastic resource for me. No exaggeration, this board has been life changing. I'd encourage you to read the resources along the top bar, and on the right side bar. There is a ton of curated material here. I've read Eggshells and several other books, but it took me several years to finally figure out what a great resource this site was on top of what I could get from books. It works best if you become a regular visitor to the message board. Let's start a conversation on this thread. You should also feel free to read and reply to the posts of others -- a lot can be learned from those discussions.
That said, your location may be fortuitous. Check out the Family Connections Program:
https://www.borderlinepersonalitydisorder.com/family-connections/One of the founders of it is Alan Fruzzetti, who I believe is at University of Washington. You might find it useful to read one of his books, "The High Conflict Couple." I believe the Family Connections program offers a limited time (12 week long?) seminar course, and I'd hope that availability in your area might be good.
WW