Hi Tamara,
Try creating a listing on IC.org to get some exposure and indicate that you're forming.
Some items that you will be asked or required to check off will need to be undertaken with some care and research, since you'll have to think about how you want to make decisions and share responsibilities. You have to start with what you need and think about others who have that need too.
PM me if you're wanting to discuss more, ask questions and such. I'm in Maryland, seeking to grow a support network too and am actively learning about different structures that work or can work. I'm really interested in the sharing economy too and believe that there is "another way" that people are searching for, that compromises don't have to be made.
You may want to look at this case study:
https://www.shareable.net/blog/how-to-share-a-house-a-case-study
Here is a sharing toolkit too (although I don't think these are the hard fast rules, they're all collectively and separately an indication of what's being done, what mistakes are being made or can be made, etc.):
https://www.shareable.net/sharing-cities-toolkit