Glad you’re enjoying it. I haven’t messed with Endevour much myself, as Arch-based stuff is a little more hands on than I want to be, personally, most of the time. I think the switch to Linux is easier than a lot of people think. It really just takes some patience, knowing that it’ll be an adjustment, and accepting that you’ll need to find alternatives to some apps.
I feel like logging in with Facebook and Google on sites is just as much about them gaining access to scrape more info about you as it is for your "convenience." While there could be value with Lemmy, it's not nearly what it is with Facebook and Google. So I would say not likely.