Welcome to the forum and to the RV life. It is a big learning curve but its the best way to figure stuff out in an RV is to just get out there and learn by doing.
My suggestion for a small tool kit would be channel lock pliers, adjustable wrench or vice grips, needle nose pliers, screw driver with multiple heads (Philips, Robertson and slot)
pocket knife, electrical tape , Teflon tape, and of course duct tape
2018 Thor Compass 23 TB