Read books, on a variety of topics, including the ones you don’t know about. A book will give you a much broader and deeper understanding of most topics than random blog posts on the internet. Make sure you read one or two a year, and think about how you’d apply what you’re learning at work. Even better, find an actual application at work.

I’ve found that solving tricky problems ( horrible network related issue, performance bugs, strange behaviour of program/framework/os, someone you know deciding to use new tech you don’t know about etc ) is usually a good way of finding a topic to explore.

Find someone who’s interested in actively learning things, it makes things a lot more pleasant, and it’s easier to remain motivated. You don’t have to learn the same things - just share the fun stuff you’re learning.

Finally, and most importantly : it’s ok if you’re not learning as quickly as when you were at university. It’s not a competition. You have a full time job, don’t have a lot of time, so just make sure that you enjoy learning, so that you keep doing it !