In my experience, working on the older generation of Subarus is actually pretty easy, especially for myself, having very little experience.
That is a very low number of miles for an '80 Brat, and if the odometer hasn't been screwed around with, it's pretty impressive.
Something you really want to look for before buying the Brat is rust. Rust is a Subaru's worst enemy. Check around the fenders, bottoms of the doors, and of course the floorpan. Bad rust means a lot of body work that you may not feel prepared to do.
If you do buy the Brat, stick around the forum. It's one of the best resources you'll find if you run into any issues or have questions.
Show us some pictures!