Thanks so much for the feedback, @justin.mabee. I appreciate the detail and the work around you have shared.
I do plan to include a forum from Website Toolbox, and that has a member profile element that is customizable and somewhat helpful for my purposes. It also has the ability to communicate within the community, as well as privately, and get notifications.
I will look into Airtable, but I do think that setting up individual pages for each person in Squarespace will be too much work too soon (hopefully!).
I've been thinking about simply using Notion as the place my members go to manage a dashboard with goal setting and the like, which can be shared with me if they want. I can also create deliverables like, work pages, forms with questions for them to add to their own Notion workspace where they can type answers and save somwhere. And they can journal (not shared with me if they don't want), and a bunch of other things. And members who don't want to do any of that don't have to.
I mostly share all that detail for you or anyone else who might find that option helpful.
It would just be nice to have it all within the Squarespace member site, of course.
I think I see having my own application coded eventually, because I have too many big plans, but Squarespace is a great place to start since I know it.
Thanks again.