I'm going to be honest with you. There are things that need to be learned if you have never owned a RV, that you don't want to learn on the road.
But if there,s no other way, As mentioned, go to the Thor owners website at https://www.thormotorcoach.com/owners/
input your vin number and you should find the manuals for your motorcoach. Read them as you are driving off, but before you go at least
1. fill the potable water tank (this is water used on board to take showers, flush the toilet and wash things in the sink. DO NOT DRINK this water as I'd guess your tanks have not been sanitized in a while. Bring your own drinking water.)
2. fill the propane tank (Propane is used to run the fridge while driving, run the heater and run the stove and oven. Make sure your propane leak sensors are working correctly.)
3. fill the gas tank. (That's obvious but gas also runs your onboard generator.)
4. Have the basic supply's needed like a 30 amp power cord, sewage dump tube and clean water drinking hose. All can be bought at Walmart.)
We are here to help.