It depends very much on taste and skill level. I would go out to a store and page through a number of different magazines. JoAnns and Hancock fabrics have quite a few. Walmart has fewer, but enough to start with.
I've liked Fons & Porter and Quiltmaker. They both have a pretty good mix of skill levels in their patterns. But now all the patterns are starting to look alike. My rule for buying a magazine is that it needed 3 patterns in an issue that I think I'd like to make. When you subscribe, you don't see that many per issue that you want to make, but the subscription price is cheaper.
I dislike the magazines that have what looks like a pattern I'd like, and then instead of being applique as I expected, it's buy this panel cut it up and sew it back together with a few borders. That might be ok for one of your first few quilts, but it's uninspired for a later quilt.