Given this was your Dads car I get the sense you are going to keep the car for many years? Sure there will be the things that will need to be fixed longer term based on the job the restoration shop did recently. I like your effort trying to get the car running now. Get it running and drive it around this summer. That will keep the flame going before figuring out how much body work it needs.
Since you’re going to be keeping the car, you really do need to get the factory service manuals (FSM) for your Duster. You can get them for free electronically or buy the hard copy version. Coming on here for the odd item is good but coming on here for every little item will be frustrating for you. We can keep catching the fish for you on items (but you’ll need to wait until peeps respond to your posts) or you can learn to fish so you’re self sufficient. Once you have the FSM, just flip through the chapters to get an idea of how your car is put together. Flip through it before even determining what you want to fix next. Then when you want to tackle something, all the info is there. Yeah it’s going to be intimidating at first but, considering you’re going to have the car for a while, you really should consider learning how to fish. Long term it will be the right thing and you will feel that much better after you’ve tackled the first few tasks.
I’m not saying you need to spend thousands of dollars on a tool chest and tools. Start with a quality socket set, multi-meter, floor jack, jack stands and screw drivers.
Honestly, you can do this! The FSM will instantly tell you how many volts your car is.