Hello Gastonn,
Welcome to modular :-)
It depends a bit what you want to do with this upcoming rack? Just getting a few tones out of it should be possible ;-) If you want to get a bit more out of it, it's in my opinion far too small. Consider either a 9U 84 HP rack or a 6U (or 7U) 104 HP rack. Sooner or later you get used to the modules you have and start to realise that you could need another filter or VCA or perhaps even a third oscillator, i.e. you need reserved space for future extension. That might sound over the top for you perhaps but you will see, once hooked up in modular, nothing is big enough, neither your wallet nor your rack space ;-)
Another envelope (beside another filter and VCA) might be another idea to consider too.
I didn't mention anything about logic modules, sequencers and other "nice stuff" yet because there is just no space in your rack for that.
Oh yes, a very important component (or did I overlooked it?) I miss is the LFO, consider at least one or two LFOs, can't find them in your rack...
Good luck with the planning and kind regards, Garfield Modular.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads