i can’t create a fully fledged tutorial or anything on this at the moment, but just you can do this!, just keep looking around for resources, take it slow, research the math and logic behind making something where you can place things. Once you create the actual placement system things usually go much faster.
if you want to you check out this placement system i made a while back, it’s a bit unorganized and has possibly"bad" methods, to be honest it’s a little poorly written, but it might give you somewhere to start:
if you use this as a resource i would recommend re-writing it using better methods, also to mention this doesn’t do any type of saving
Feel free to message me at some point! When i have more time i might be able to give a more in-def answer on this subject