Based on what you already know.
That said I'd use:
Communication: Gmail
Docs: Google Docs
CRM: Google Docs
Team Collaboration: Google Sheets
All free tools, no need to get fancy here. Again, the least of my worries.
For that, the Traction book would get you off to a very good start in implementing your company "Operating System".
I do understand your interest in tools though, but I spent far too long obsessing over tools in my business. Perhaps it's because I'm a software developer and I wanted to believe that tools could fix the problems, rather than facing up to the more human challenges.
Right now our 15-person business uses Notion, Slack, Google Docs, Figma Jam, Semrush and Productive. These cover all the things you mentioned.
All the things you mention are only nice to haves.
Because money from customers allows for inefficiencies.
Good luck.
And if you have a great idea which hasn’t been taken, it is most likely a feature that the big tech companies will just steal anyway. (e.g Clubhouse)
The competition is far too great to start a startup.