Ask HN: KISS and front-end development in 2019?

I am a teacher by profession but have been a self-taught coder and web developer for 20 years. I'm comfortable using microframeworks like Flask on the back-end, but my front-end skills are truly lagging. I default to hand-crafted HTML5 like it's 2008. And don't even mention my JavaScript/ECMAScript skills! I know I need to modernize my front-end development skills, but, to be quite frank, I'm totally disinterested in the currently en-vogue ecosystem of JavaScript packages, package managers, build furnaces, dependency demagogues -- well, let's just say it's too much for me to manage in my spare time. So how does one Keep it Simple, Sweetie? The KISS philosophy has guided my design decisions since I started coding in LOGO when I was 8. How can it guide my front-end development in 2019?