You would do well to look up the E registry and the Early S Registry (which has a very active bbs, even if there is a little attitude that comes with it
) Those folks can tell you all the particulars like the fact (IIRC) that the '69 had as an option the soft window.
AFA restoration, you can do the lion's share of mechanical stuff like redoing the old brakes, cleaning out the gas tank and replacing those old brittle fuel lines (a must!). When it come to cosmetics, well, only your ability, or lack of, counts. Most of us don't do upholstery very well, so we leave it to the pros (you'll find out who the players are as you go along, so don't be too hasty).
There will be a lot of general clean up and details to sort out like maybe in the doors, or in the trunk. You can do all of this with patience, a few tools, and a LOT of time. Don't underestimate time.
Don't try to start the engine until you've read up on starting procedures and there's a lot of threads here and elsewhere about that. Things like suspension bushings and steering don't seem to deteriorate as much as one might think.
Rust is very important to know about. Read up on the common trouble spots and investigate thoroughly. Although, if the price is right, take it as is and deal with it later. My rule would be for every 1000 dollars you can take off the car because of an issue, double to quadruple that to make it right. Count your time for something. Lord, I've spent a 1000 hours on at least 2 Porsches and a few hundred on others. At ten bucks an hour that's 10 grand each. Take it to a shop and it's over 7 times that, these days.