I've tried both for about 6 months each - it was a decent way to discover new packages. I lean towards spacemacs (I had less problems) just be sure to use the development branch. In the end I dusted off my old config and started adding the packages I liked. Troubleshooting doom or spacemacs is harder than plain emacs when something is misbehaving (better docs, larger community). I'd als suggest using emacs 29, feels a lot more snappy that 28 and use-package is pretty nice.

Check out system crafters guides on emacs on YouTube when you decide to start rolling your own configs.

GL