Yes, winterizing is pretty easy.
Use Search for any question you have because that one has been answered a zillion times.
Get 5 gallons of RV antifreeze next time you are out.
Best is to first use 45 psi of compressed air (do you have a compressor?) followed by having the fresh water pump pull antifreeze from the jug and then pressurize the system with antifreeze that you then open all spigots, ice maker, washing machine, front water line, etc until all are spraying antifreeze.
Absolute most critical is the water heater. expensive to fix. depends on what type you have on how.
2002 Newmar Mountain Aire Limited 4370 w/ Spartan K2 and Cummins 500hp
ASE Master Certified (a long.....time ago...)