Ask HN: How do you manage your learning while being busy with a full time job?

I'm a curious person and I have thirst for knowledge and learning. There are tons of stuff that I've always wanted to learn. When I was a BSc student, I remember I used to learn actively and I used to do self-defined projects. But after graduation and getting employed things have changed. Let's say I want to learn a new programming language by doing a self-defined project or some math like abstract algebra. The problem is that when I come back home from a software engineering job I like to chill or socialize. I like to watch a comedy. Not even drama or documentary. Only comedy. something that boosts your tiredness. I don't call it laziness. It's just that you are mentally tired and like to socialize or chill. So I will have only weekends and some of these stuff should be done daily otherwise it takes months to finish (like studying a math book). As a result of this it's been a couple of years that I have not done any self-defined projects or I have not learned anything outside of my daily job although that I feel the thirst for knowledge and learning.

Have you faced this problem? How do you deal with it?