Or learn more about a specific industry that interests you? Film, games, energy, natural resources, healthcare, accounting, finance, whatever?
Software is your pencil, and you might have great penmanship, but there's still infinite topics to create stories around.
Outside of this, I am paying for DeepLearning.ai specializations on Coursera and enjoying it a lot. The material itself can be reconstructed from free web resources and textbooks but the value is in systematic syllabus, quizzes and programming assignments.