This is what courses are for. The instructors choose the technologies and instructional materials (books or websites or...) and present them in a meaningful or

This is what courses are for. The instructors choose the technologies and instructional materials (books or websites or...) and present them in a meaningful order. It doesn't matter so much which technologies and materials they choose -- there are many alternatives that would work -- what matters is that experienced people make the selections and shape them into a coherent story. If you aren't able to take a course (or don't want to) you might still be able to get some of the benefits by finding a course with a published syllabus (including assignments) and following it on your own.