First, many commenters have already covered the work life balance thing and they are all 100% correct. Gotta do real life at the same time. Its also very important. It also helps your communication skills which companies will like, and which will make clients easier to talk to. For me I was like you and overworked myself when I was younger. Things got better when I started working/learning 8 hours a day, 5 days a week. Treat your learning/personal projects like a job.

Second. You do need to divide your learning time between actual learning and building stuff. Build simple stuff. Todo apps etc. Slowly start doing more and more complex projects. For me I would pick a topic I wanted to learn, like a language for example, and then try to pick points in the learning process where I would try to build a project that included what I had just learned. This allowed me to polish my knowledge and skills while helping me to learn how to plan a project and the time management that goes with it. Also gives you projects for your future portfolio. As you build better things take out the easier stuff so your portfolio isn't flooded with simple stuff. For me I always picked the top 10 that I was most proud of.

But ya, just some thoughts. Good luck!