Outside stuff......
Don't leave dump valves open while using waste tanks.
Wait until waste tanks are almost full before dumping.
The higher volume of liquids helps carry the stuff out of tank.
Dump black tank first........then flush/rinse it using the black tank rinse connection.
Then close off black tank dump valve and add a few gallons of water back into tank so bottom stays wet and stuff doesn't stick/dry out. Then disconnect hose to flush connection.
After dumping/rinsing black tank....dump grey waste tank so the soapy water flushes line/hose.
Check wheel chocks and stabilizers once a week while parked. Make sure they are still tight/snug.
Rig should be set up level for proper fridge operation....reasonably level. Set glass of water on counter close to fridge and check.
Hopefully you already have a water pressure regulator on potable water hose feeding the 5vr. Good idea to limit water pressure to 50#
Cover tires to protect from SUN.
Not much else while parked. Other things IF you play on moving 5vr.
Good luck in your new phase of life. You can do it. Ask neighbors for help.