Continuing education in software engineering has always been a challenge for me. While my current employer allows for 20% time to learn new things, I find that I'm just unable to. Many employers (not all) place constraints on what one can do with that time. Typically the biggest constraint is that it must relate to the business in some way. As such, it can be hard to justify why you're spending your 20% time learning how load balancers work in nitty-gritty details since it's unlikely you'll be writing one from scratch or helping the company with it.
Not only that, but if you choose to learn on your own time, finding a lesson to fit in your daily routine is also tricky, especially if you're caring for a family or have other commitments. Couple that with uncertainty about what to learn next, it can become overwhelming just to get started.
Very recently, I started working on a project[1] to address this exact issue. The project is to help established software engineers progress their careers, learn new concepts, and refresh their existing knowledge with daily bite-size software engineering lessons designed to fit in their daily routines.