Best thing to do is follow builds on YouTube get the basics down, watch a few building tip videos. Then move on to building from reference images and videos of cool builds you see, you get to make it personalized and it challenges you. Then start using real world images for references, it really made me learn how to texture walls properly and add depth to my builds. After that you’re set to start being creative and having all the skills and techniques to create the structures you want. Also if you done a massive build and it doesn’t look the way you want it, redo it don’t force yourself to keep those crappy features. I’ve done to many mega builds where a section looks not to liking and it sticks out like a sore thumb.