I wish it was easier to program a GPU...

I've already refrained myself to learn vulkan because it scares me, but similarly, opengl and cuda are a bit mysterious to me, and I don't really know how I could take advantage of it, since most computing tasks cannot be made parallel.

I've read there are data structures that are somehow able to take advantage of a GPU as an alternative to the CPU (for example a database running on a GPU), but it seems a very new domain, and I don't have the skill to explore it.