Find something programming related that really interests your curiosity no matter how useless and work on that. Nothing motivates learning like having something you want to do with the skill beyond “so I can make more money”.

Maybe you want to learn networking protocols and data parsing and connectivity, make a trojan horse, or a packet sniffer, or a key logger.

Maybe you want to understand algorithmic processing and wrap your head around design principles, build a calculator that intentionally doesn’t work and produces funny results.

Maybe you want to get into game development? Make a dope wars clone.

You have to find your interest, after that the motivation finds itself.