This is my first post but I've been 3d printing for several years. I'm OK at it. I can make great parts in some materials and less great parts in others.

From my perspective, there are a lot of things that can only be learned by 3d printing stuff. Other things, can only be learned through research. I suggest you keep reading everything you can but also don't be afraid to start printing objects.

3d design can only be learned by reading and then doing. Treat it like an engineering class. Read the material, then work with it.

I spent a few months designing and printing anything that came to me in a whim. Early on, I would struggle but now I can see a part that is needed and have the physical form a few hours later. That approach served me well, although it certainly isn't the only way. At some point, however, you're going to need to build your 3d design chops or you will be relegated to printing novelties with your printer for the rest of your life.