In the last week or so I've been playing some regular 6-max tables, along with Zoom.
To switch it up, but also because in Zoom you can skip hands so often that it's easy to only hunt for spots with fat value, and regular tables force you to play well in less optimal spots. Kind of like in tournaments.

Now that I have to select good games because it's not Zoom, how should I approach game selection? I am willing to play guys better than me, but I obviously also need to play some fish, so I don't go broke.

Signs of a fish:
1. Stack size. Players who don't have a full stack and don't rebuy are usually not winning regs.
2. Visibly playing a low amount of tables. Most fish only play one or two tables, and they don't hide from the search function.

But what more should I look for?