Brother built a new pond, now what to do?

[Tx fisher]

(Facing the dam way back there)

Hello, brother just finished a new pond earlier this year with the help of the soil conservation people's help. He said its going to be an acre and a half or so full. 30'-35' at deepest depth and has a feeder creek that was dug out to give it a long triangle shape with a round deep normal stock tank at end. It's maybe 80% today. He put 100 channel cats and 5lbs of minnows back when 30% full.
My question is, what kind of structure should we add to the tank? My idea was a couple 16' low boys full of hardwood trees dropped on NW side of the lake up in the channel going down to deepest depth. In a line.
He's not sure what to stock since he doesn't fish much. I thought catfish,bluegill,red ears, and hybrid perch. He said he's not sure about black bass or crappie.

(From the point in front of the dam)

The ponds in central Tx around a lot of farm land. Black dirt/clay bottom.
Looking for ideas for an occasional fisherman to do.