fly fishing on the lakes

Guys, I got a small fly rod (bream-size) and haven’t much fly fishing expertise. I can get the thing out in the water, other than that I only produce the occassional bream. I’d like to tie my own simple flies and would like to target something a bit tougher than bream, like nice crappie, white perch, or bass. Heck I’d fish for jacks, so long as they fight good.

Any advice?