Your beginning tasks are to:
1. Measure maximum and average depths.
2. Determine water clarity several times during the year. Learn about a Secchi disk and how to use it. Water clarity is often the best in late winter.
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=92624#Post926243. Determine the composition of the fish community.
A. Learn to identify the sunfishes (TX perch) mostly bluegill (BG), redear sunfish (RES), coppernose bluegill (CNBG), green sunfish (GSF), hybrid bluegill (HBG).
B. Do some fishing several ways using lures and most importantly some live bait on small hooks under small bobbers. Keep records of all fish species caught and the length of each. Weigh many of the bass so you can determine the relative weight of those fish ( fish wt / standard wt X 100).
C. It also helps to record how many fish of each species that you catch per hour of fishing.
D. The above info will be needed to give you good advice for managing your fishery.