Bought my first classic car, – 1985 Oldsmobile Toronado. Any tips on owning it?

Bought a pretty clean 1985 Oldsmobile Toronado for 7K.

Its got a couple issues though but they are pretty small.

(Small electrical things on the inside, I cannot power lock the doors from the drivers side, the dashboard lights to see at night dont turn on, the seat motors don't move the seat, the brake light warning turns on but there is nothing wrong with the brakes, the bumper fillers need replaced, and the AC needs a wire replaced which I own to work) but is otherwise good.

Any tips with owning this car? Currently though I wanna know how to install the bumper fillers and how to replace the ac wire (I think the last image is the right wire???) since thats what I have the parts to do at the moment.