I don't know if you're new here or not, but if you are, let me tell you; keep at it and don't forget to join groups! I've joined a few and gotten a good few watchers over the course of a few months, compared to over a year when I was part of only one or two groups.
Some people join dozens or hundreds of groups, which is great and lets you get your art out there if you can keep up with all of that. I've only joined a few and I've got a small amount of watchers which is still quite nice for me.
If you aren't new then you probably already know this, so, sorry being a broken record if that's the case!