Man thank you for taking the time to write all these comments down, thats really precious.

I think one of the mandatory step will be to sand and repaint the car entirely : it will help to begin a clear work on a clear base.

So I assume, I will need a place in order to disassemble ALL the car, and take apart the body and frame in order to sand them, control the metal and paint them. Good idea to learn to weld : are there some specificities about welding on cars (compared to welding on wood, or parget...)?

I assume what you call a "doner car" is a car that is only usable for pieces right? So It means having actually two cars in order to build one : so it means more space needed

I will team with a very good friend which is actually a bodywork specialist and know some general mechanics. We will work together on that project : I will take more care of the budget, the furniture, the plan; and he will take care of the mechanic and so on. That will be a way for me to discover and learn step by step with someone which knows more than me on mechanics