First off, welcome!
As to getting started, I suggest that you start slowly. Prioritize projects that will get your Vette out of the garage. Safety is the first priority! These cars are old, and new to you so you have to learn all that is wrong with it and how to fix it. If you jack it up, always use 1 or 2 jack stands to safely support the weight. Oh yeah, don't jack it up by lifting the curved frame section under the front of the engine; it's weak.
The electrical system looks like it needs attention so you can get the engine started. If you need to replace any of the wiring harnesses, then I strongly suggest you buy the two OhSoEz diagrams from Dr. Rebuild. There are lots of Corvette part suppliers on the internet. Do a Google search and read, read, read!!!
The Brakes: Now that the engine is running, and before you leave the garage, make sure you can stop. Check the master cylinder for dirty brake fluid. Check the calipers for leaks and sticky pistons. Look for rusted, wet or leaking brake lines. Replace the flexible, rubber brake lines at each wheel. Bleed the whole system. PB Blaster is a good penetrating oil to help with the disassembly of all the corroded fasteners.
Steering: Check the steering linkage for looseness. Check the suspension parts like the rubber bushings, and ball joints.
Replace every rubber hose. Especially the fuel lines. There are several at the gas tank. 2 or 3 at the fuel pump, and possibly one at the carb.
Replace all the vacuum hoses. There are several good suppliers for this. I like Dr. Rebuild because they have good diagrams and instructions.
This ought to keep you busy for a little while. You'll get lots of help from this forum.
Enjoy the journey!
John
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1973 BB 4-Speed Coupe Project Car
2009 Z06 Mostly Stock