Welcome and sorry to hear about whatever happened.
First, take a breath and slow down. It’s all good. You have a new RV with all kinds of features, apparently including a generator.
Learn how that works and keep your batteries charged with it. It may run off the coaches gas tank or propane. If propane it uses it fairly rapidly. Remember it’s like any other engine. Needs oil checked and changed occasionally. Figure out what you have for house batteries and if you have an inverter on board. If you do, you can use it to power small AC appliances like charging computers etc. Air cond will require a plug in or running the generator.
Good luck and try to have fun with the experience.