I am a lot like you. A lot. This is why I enlisted help on the repair work. I'm no welder. I'm no body guy. I don't want to destroy my car.
I can take a part off, buy a new one, and put the new one on. But the scope of an entire car restoration usually needs some one with an extreme amount of time, or a lot of experience, or both, which generally means a professional. That's who I went with.
If I were you, I'd stop taking the car apart and start looking for someone who will help you with the body repair work. From that point, I would work to put the car back together, again enlisting someone with experience. When it's back together and the car runs, you can then start thinking about paint, upholstery, shiny chrome, etc. Unless you have 20 grand up front, it's just too hard to put these things together all at once. When the car is together and you actually have something solid to build on, something that is drivable and insurable, you can enjoy the car while you're fixing it up over time.
I mention this from experience. I'm on my second vehicle here. I tore apart the first one I bought (old truck) and $12,000 later it is still sitting unfinished in my garage. I only drove the vehicle one time for about 5 minutes, then I tore it apart the day I bought it. Six years later it still sits without me ever enjoying it. I've thought about getting rid of it, but I'm too close and would lose way to much money. Also, my pride won't let me give up. The entire rolling chassis is done, engine done, brakes, everything powder coated, Ride Tech suspension........ it just sits.
The Pontiac I'm working on now will be drivable after 3 months from starting on it, and it was wrecked to hell and back. When the wrecked part is fixed it will still need a ton of body work, but I'm going to wait and drive it for a while. When I start spending money on it again I'll feel like I'm actually getting something for my money, rather than feeling like I'm throwing cash into a hole like I did with that truck.
Sorry for the long story. I just wanted to tell you that you're not the only one who struggles with this stuff, and that it usually is all about each persons approach to restoring a car that brings on the "**ck it" feeling.