DIY wall-mounted shelving :: Uses twin tracks & sturdy brackets; shelf heights are adjustable. Brackets are screwed to boards that were sanded & stained for the shelving. As was said, it’s all about meticulous planning *before* drilling any holes :
DIY wooden coat rack from a branch You end up with more professional and consistent results. The simplest shape for a novice is a rectangular or square one. Obviously, you've to remember to consider exactly what sort you're acquiring.