Hi Alec. Yeah, PC is a huge forum. The way I navigate it is by starting with "Introductions", then onto "General", on down the line of boards. I stop at the boards I want to check out. If I'm short on time I go straight to the board I post on the most.
There are plenty of us on PC who are 55 and over (I'm 55). As for senior men...Gus and skeezyks come to mind right off.
It sounds like Relationships and Communication might be a board to check out for starts (besides this one).
By the way, my husband has a tremendous hoarding problem. So much so, in fact, that there is no room for me to live with him. I live in my own apartment, one mile from my husband (we've been married for 35 years).