Hello and welcome to the forum!
It's great to hear that you're continuing to take on this project to honor your Dad. I'm including a link to our site's DIY tech articles - I think you'll find them super useful as you're digging into more repairs and maintenance.
https://www.pelicanparts.com/Porsche/techarticles/tech_center_main.htm
We also have a very active and knowledgeable community, they'll be able to assist you as well.
Let us know if you have any other questions!