@sil I think the answer is "yes" -- do what makes sense for you.
You could divide your social network stream. Many clients support multiple accounts.
You could follow folks over there and participate in discussions.
You could use an app that lets you look at other timelines without following anyone.
I think it depends on how you plan on participating more than there being a correct answer. I imagine that in the end people will have a few ActivityPub accounts they use differently.