OK first - look at "Search" function here. Advanced Search generally works best for me. RESTORING threads aka "Full Monte" threads will be a good place to make a list of chores - along with the appropriate order to make repairs and upgrades will be a great place to start.
Next - Meet fellow Airstreamers! At the bottom of the Portal page, you will find a list of rallies, caravans, informal get togethers, etc. Even if your "new" Airstream isn't towable, or is an aluminim tent, you should definitely visit one or more. Vintage owners will be more than happy to show you their rigs and teach you the ropes. ....and give you ideas.
Third - sell everything you don't absolutely need to live - you're gonna be pouring some money into the Airstream! (Jokingly but...)
And most of all WELCOME!
BTW - I don't know exactly where Tupper Lake is, but check on Colonial Airstream - it's in NJ - near Philly, so it's pretty convenient to eastern NY. A good dealership to visit and look at "new ones" - again for ideas. There is an Airstream only park in southern NJ and another one in western PA - both great places to see other owners who are almost without exception helpful to newbies. The Reviews tab will give you reviews of those campgrounds.