I'm still using the club bows at 24# or so, really focusing on technique and precision more than accuracy or distance. If you really want to improve I'd say it's probably worth it to get at least a couple lessons; sure you can watch tutorials and practice on your own, but it's entirely possible to develop bad habits that way. Having someone external observe and say "actually no, your hand should be doing this" or whatever will catch errors you don't even know you're making.

The thing I'm finding helps the most is to not actually worry much about hitting the target. The bow will do that for you if you operate it correctly.