I taught myself as I went. I save about 10x over AWS. I would likely make the same decision today if I was starting from scratch, as I did 12+ years ago when I first started doing infra for our small website.
Infra is not magical, it's probably the easiest part of my job. Way easier than messing around with JS dependencies, way easier than troubleshooting a segfault in a C extension for our Rails app, and way easier than marketing, business management, accounting, interacting with legal, etc. And takes less time too.