String wax about every 1000 shots or a couple times a year, whichever comes first. People get carried away with the wax. If you're just practicng on targets for now, when you're done put the bow in a case. No maintenance needed. If you have been shooting in the rain then wipe it down with a towel, let it air dry over night, and put it in the case. Probably wouldn't hurt to pull the string back a few inches and snap it just to knock the water off/out of it.
The riser is aluminum that has been dipped, powdercoated or some other process. Weather doesn't affect it. Same goes for the wheels/cams. The limbs are fiberglass so weather doesn't affect them either.
The bolts that attach the sight, rest, and other accessories are usually just steel. Spray them down with a silicon spray if you want. Thay will probably get some surface rust anyway and it won't affect the bow's shootability.
One thing I would do if I were you is remove every screw on the bow one by one and put bowstring wax on the threads. This will help keep them from seizing.
Bows require little to no maintenance from everyday shooting.
Probably the best maintenance you can learn is, once the bow is set up and tuned, measure thing like brace height, A2A, rest position (vertical and horizontal), nocking point height, peep height above nocking point and anything else you can think might be useful. Take an actual measurement of the draw length and use a scale to check what the draw eight is. In both these cases do not rely on guess work. Just because you may have the bow set for a 29" draw doesn't mean that's what it will measure. Just because you have a 70# bow doesn't mean it will weight 70# with the limbs bottomed. Don't trust limb stickers.
Record all these measurements for future maintenance such as string/cable changes.