When I began studying photography (college 1970's), I was quickly made aware of how little I knew. As I studied, and learned more, I soon came to know that the more I learned, the more there was to be learned. Once I realized I would never know it all, I concentrated on what I did know- keeping it basic (same film/developers/etc, as suggested above). Photography is almost infinite in its variety. No person can master everything. Your best option is to work with a limited number of materials, doing your best to master them.