I know that here was the same question. Which one should i use if i want to forget all vim keys and use only emacs features(no evil mode), i want to use only emacs, no vim anymore!
Honestly, start with Doom to just get a feel for emacs. Eventually, you might get annoyed with some of its limitations when it comes to customizing your setup.
By the time you reach that point you’ll have an idea of what can be done with emacs and this is where you finally make the switch to vanilla.
You can even make it so you have your vanilla stuff in a separate folder, so you can make it more usable bit by bit, while still having access to doom.
Emacs 29 introduced the --init-directory command line option, so you can have completely different Emacs instances that don't interfere with each other, loading different modules, ui and what not. You can simply create a shell script for each one and play with different flavors of Emacs. I've done it for example when I changed my completion system from ivy to vertico to see if I liked it (I did).