First: Welcome aboard!
Now take a deep breath... and let's get started with the easy stuff first.
Finding a set of manuals for your rig is a monstrous task... try using YouTube and Google.
Shorepower socket? Are there any sockets on the LH side of your rig? How about under a small cap, or in a storage compartment?
Batteries? 12 volts is right; but where are they hidden? Try under the entry steps first, and then start digging in the outside compartments first... followed by the inside closets, and under the bed.
One step, and one deep breath at a time: you'll get it!