Have I returned at the wrong time?

[Naryoril]

Kinda sounds like you were using the Party Finder system to look for running a low level dungeon. Few players, if any, will utilize that system. You might get a few bites if you explain that you just want to do something low level easy to learn the ropes. But, if it doesn't really matter who or how you get a group, just queue up for the content. The Duty Finder will get a group of players together and dump you in.

Also yeah. If Party Finder was that sparse, likely also you're on during the off hours.

This.
To emphasise: Use duty finder, not party finder. Iiirc on PC the default key to open duty finder is "U". In there, select the dungeon you want to run and click the "queue" or "ok" or whatever it's called button, the game will start searching a party for you, in the meantime you can go do whatever you like, as long as it isn't instanced (the game will warn you if you try to start something like that). As a healer or tank it shouldn't take more than 5 minutes, as DPS 20 minutes or more are normal unfortunately.