Vicky welcome to the PB forum, I will give you a few comments but the resident experts will have alot more info for you.

If you get a fish trap you can really check on what's in your pond and it will be a usefull tool later on. You might want to start out this year with forage fish like fatheads, golden shiners and being in northern ohio Pumpkinseeds would be better in a shallow pond than bluegill. My personal opinion would be stay away from government fish but that's just me.
Putting in structure will help the forage and running the aerator will help water quality.
Also a water test kit and thermometer would be valuable to keep a record of your pond water for future reference.
I'll let the other guy's go into detail of fish species and water quality remedys.