I must admit, this is one heck of a comprehensive post. It's very obvious you did your due research beforehand.

Although, before going into the world of NFTs, you should have it in mind that it's not all NFTs that will sell

Well said, a lot of new investors would often pay no attention to the what-if aspect and instead keep their minds focused on only what they stand to gain if the project gets traction. This is one reason people lose badly in the space.