Congratulations on the new to you RV. There will be a lot of learning for you in the months to come. Don't make the mistake that a lot of first time RVrs make by loading up lots of heavy stone or glass dinnerware and cast iron pots. Keep weight to a minimum.
Using the generator on the road to power the AC is only necessary if you get into temperatures that are above the ability for your cab AC to keep the rig cool. You might find it better to run the roof AC if you are pulling a lot of steep passes so you aren't taxing the engine with the AC pump running.
Usually there is no need for 50amp power at home. For normal storage you can get by just fine with 20 amp. If you plan on running the AC while loading the RV for a trip then you will want 30amp. 50 amp is really only necessary if trying to run 2 AC units at once.
Most of all, be sure to pack your sense of humor and take things in stride. Remember you are driving a house down the road so you do tend to end up with problems and things that need to be fixed from time to time.
You might also want to read up on the 12 volt systems of an RV
And the water systems
Enjoy the rig and have fun.