Like when I joined here and started my Eurorack Journey, everyone is going to tell you to have a Goal in mind before you start.
It will stop you spending a load of money on something you find you don't use or didn't need
Figure out what you want your Rack to do.... for me the initial goal was to fill in the gaps around the other gear I had so that the combo of other gear + Eurorack didn't have any crossover.
My goals have slewed a bit and I now want to bring in some of the capability of the external gear into the rack but not fully.
I don't think I followed the advice given here, but that's not to say that it wasn't helpful ;-)
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.