Since having the new lock installed and putting the tiny table together I have been working on the electrical and insulation. On the outside I installed the 30 amp electrical plug to bring power into the camper, a 15 amp outlet, a 12 volt light, and the coaxial cable connector. I have mostly worked with wood in the past and quickly found the metal siding on the trailer to be very unforgiving compared to wood. Drilling holes in the metal was not difficult, but trying to cut out larger holes with a jig saw was not fun. Perhaps in time it will get easier.
On the inside I removed the plywood walls and cut out foam insulation panels (1 inch thick blue foam) to fit into the metal channels. I filled any gaps with spray foam insulation. After the spray foam cured I trimmed the excess and notched out a channel in the foam for the electrical wires. Then I put the plywood back on and mounted three outlets, the cable connector, and a TV mount. I also put a small breaker box on the floor to connect all the AC wiring. A DC electrical panel is due to arrive any time. For DC electrical I will have the outside light, an inside light, a ceiling fan, and a accessory plug. (The inside light, ceiling fan, and accessory plug will be installed later.)
My next focus will be to build the frame of the bed. I want to be able to store stuff under the bed (spare tire, electrical panels, batteries, etc.) Then I will start putting some finishing touches on the walls, corners, and floor.