When I was your age that car was brand new and I was building my 67 Firebird. If you don't have tools but can borrow some, your going to need to borrow some. I'm glad to hear that this is your passion...your going to need a lot of passion.
An angle grinder is going to make it difficult to cut patch panels the same size as the panel you cut out. There is a right way and a wrong way to repair rust and butt welding panels that are cut just a hairline smaller than the rusted metal you take out. I wish it was as easy as cut and weld...I've made patch panels that take hours, cutting, forming, trimming tack welding, hammer and dolly, more welding...more hammer and dolly...it goes on and on.
When are you planning on starting?