You need to just start reading, and more reading.... its all right here in the archives. I know it can be tricky to some, trying to find the right info using the "search" function, but its well worth the effort to try and find what your looking for.
That car actually doesn't look in that bad of cond. rust wise... sure, there is lots of surface rust, but in my eyes, I see no real serious rott.
Your problem is going to be, money and experience.... Lot's of other guys have managed to make a nice Z out of much worse than that, so just settle down and take it one step at a time... you'll be rewarded in the end!