I was sparse in my reply.
When I first got into computers I was immediately attracted to game modding. 3d art, 2d, sprites, textures, scripting, mapping.
And then I moved into c++ with the arduino platform messing with model train DCC systems and automation. Then wrote software for an Ethernet connected thermostat and a front end in php for some home automation…
My next endeavor will relate to emulators and input. And a controller for vehicle telemetry/control.
So pick something that interests you and create.
If you’re trying to develop vocational skills, you’re doing it wrong. Develop skills, and then apply them to a vocation. Reminds me of people going to school to get a job, no you are there to get an education.
Anyway, have fun.