Another vote for vanilla, learn the basics and then add packages for what you need.

I have spent my entire career using vanilla emacs with a few other packages. A lot of things, including org-mode, are included by default in modern emacs.

The problem with learning heavily customized distributions like Doom is that they won't be installed elsewhere and if you have to use emacs on another system you won't have what you're familiar with. Weigh that relative to how often that happens in your work.