Etsy is an excellent source of inspiration for many who frequent the stores, but making your own models like those in this list is a large undertaking. That’s not to say you can’t, of course, and the complexity depends on what sort of equipment you have. Many models will have been 3D printed, which is a whole art form in and of itself. I recommend checking out the 3D printing subreddit for more information or Thomas Sanladerer's YouTube channel.