I just re-introduced myself to HTML, which I haven't really touched since I made a site on Geocities in the early 2000's. Based on what I've seen so far, there haven't been many changes, but I also haven't really gone that deep. I see more attributes in terms of reading the kind of device being used to help make it a more unified experience.
I've spent more time familiarizing myself with CSS, which didn't have very wide adoption when I used Geocities. CSS is much simpler than I originally thought. It has very simple syntax, how it processes the code is really straight-forward, and it's really clear to see how it integrates with HTML.
I'm currently working on a portfolio site that at least matches the device-responsiveness of my current site and has a bit of pop to it. I'm getting started with Bootstrap, and I kind of feel like a cheat by using a framework, but I'm going to use it until I hear that it's bad practice. A lot of smart people have worked on that library, so why not stand on the shoulders of giants?
I'm really excited to see what I can do going forward.