Figure you have a road worthy "vehicle" that is also a "house". So, you will need to do basic house and vehicle maintenance. Depending on where you live, you may also have open/closing maintenance similar to that of a summer home/camp.
For me....
Spring brings and opening regiment that includes an inspection of ALL household type appliances/devices. Water, electric, sewage, and making sure all doors, drawers, etc... are in working order. It also includes "vehicle" type maintenance to make sure bearings, tires, lights, etc... are in working order. Typically this involves a complete inspection, inside and out, as well as a good cleaning to get off the winter grime. Relatively simple for the average DIYer, and most can be learned on sites like this one, as well as thru videos.
During the camping season, basic lights, battery, brake stuff everytime we hook up. Plus, minor repairs as they pop up.
End of season requires a winterizing process (again, easy to learn) and another cleaning of the interior to make sure that nothing is left behind that might feed a hungry critter during the cold, bleak months to come.
Basic hand tools and some common sense normally does the trick. Just remember, if you need to ask...plenty on here can point you toward a good video, or give sound advise on "how to". Trust me, the opinions vary, cover or not, blow out the lines or antifreeze, etc....Take it all in...then do what you feel is best for your situation.