You MUST be sure of what you want. Make a plan and stick to it. Changing the plan will cost you money and often, it's a lot of money. Once you reach your goal of the basic plan of a safe, reliable and fun car to drive around in, then, you can start looking at modifications. Get the car going first! IMO, do the body and paint on the car as the first major step. Then the interior. Then your drive train. Then your mods.