I have a ‘77 911S that has been in the family for 40 or so years. I got my hands on it about a decade ago after it had been sitting in a garage without much attention.
I had a few interesting surprises when I first got it.
The shifter bushings turn to dust. I drove the car 500 miles to get it home. The last 100 I couldn’t get it into 3rd and the last 50 couldn’t get it into 5th. I slept some time doing research on this forum, bought the parts from our host and a week later did my first repair. I was hooked. It is an easy repair and the results made all the difference. I actually thought I might be mechanically inclined. There are many high end options for these bushings but after 10 years I am fine with what I got.
Next, don’t be surprised if your CDI box dies. I had an old prematune and went for the MSD upgrade. That install took a while but I learned a lot. While you are in there be sure to get rid of your points for an upgrade and get a new coil.
These are two relatively cheap fixes you can do on your own.
This forum is all the help you need.
Good luck.