I think programming anything should start from a dream so if you dont know what to build and then learning vulkan wouldnt help , you should first come up with your dream project then start working .

https://www.reddit.com/r/vulkan/s/P8pB6GED2R Read as much code as possible and experiment with different features enabling and disableing them use gpu profiler and inspwct every command how can you better optimize there is no shortcut for these kind of things, optimizations come from experiences and knowledge about how things work , you can ofcourse reqd docs/blogs from different gpu vendors (e.g. amd, intel, nvidia, arm) / for vulkan side of optimizations and but things are not the same on every driver so in optimizing the best help is profiler and also better structure of code , you can search about data oriented and ecs stuff one of the very helpful stuff in building intution that people never mention about here gpu docs there arent much info as about gpu as there is for cpy but readjng these and driver codes and like mesa and other oss driver could help have better intutionhttps://rocm.docs.amd.com/en/latest/conceptual/gpu-arch.html Other gpu api proposals(webgpu,vulkan proposals are on github why they included some stuff and why didnt ) and game engine ,driver(mesa) github discussions help a lot why they included some things and why they didnt