Restoring the car

Hello everyone, I’ve already got a little bit of advice and read some good questions and answers, but I wanted to talk to the car myself again. I’ve already had a long dream of restoring my own project cart and making it chic, so I’m practically building my dream car myself. However, I’m more lay than experienced in car technology. I’m not completely inexperienced with the engine technology, however, I’m just learning about land and construction machinery mechatronics and doing the maintenance work on my moped myself. However, I’m still not familiar with cars. My mind about the whole thing is now to have a hobby or rather a passion. My question about you now is, what, just as the first project, should be offered for cars and on what I should pay special attention to when buying (The zb rust is a big nick break I know, but what else is there? My taste doesn’t go personally towards the very old German cars, but rather towards the JDM’s from the years 1980/1990. So Toyota Supra, Nissan is a big nick break, but what is necessary for me?