I concur with chaunc. Wal-Mart will have what you need. For gill, crappie or any sunfish, the lighter the wt, the more action/sensitivity in the rod.
Cast bead head spiders for bluegill or any sunfish. I personally use a 3 wt rod. Remember, the reel is not important for casting, just reeling.........
if your doing it right. I use 2 lb. tippet to tie the fly on. The rod acts as your shock absorber. Leave the drag very light and allow the fish to tire itself out.
Never horse a fish with a fly rod. The fight is half the fun. By no means an expert, but 15 years of experience. I tie a fly that looks like floating catfish
food and fish for channel cats up to 10 lbs, using a 3 wt rod and 2 lb. tippet. Let 'em run, the fight is half the fun.