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If you can, host your own file server to replace google drive. If not i guess mega.nz is ok.
ChromeOS can easily be replaced by linux. https://linuxmint.com/
There isn't really a great alternative for gmail, so unless you will host your own email server i guess you can use tutanota.
I recommend you check out MentalOutlaw on YouTube.
If you have a Chromebook you’d like to install Linux on check out The Eupnea Project. Works like a charm for me and it’s way easier than modifying firmware.
Email: ProtonMail or Tutanota Android: GrapheneOS or Caly Drive: ProtonDrive or Tresorit ChromeOS: Any Linux OS
Alternatives is Android to lineage os ChromeOS to manjaro kde (or arch) + waydroid Google drive to mega Email to protonmail You can also self host protonmail and hook mega to your Linux machine if you don't mind your machine to work 24/7 Also there is fediverse alternative to YouTube called framatube, it works from newpipe app and browser Also newpipe app support both YouTube and framatube don't show ads and don't use API so can't be blocked, downside is you can't write comments inside newpipe app as it's don't use accounts
Mozilla Firefox is my main browser, I definitely like it more than Chrome. It supports adblocking, doesn't hog RAM, and doesn't track your activity.
But it goes beyond that. Firefox lets you open tabs and specific domains in "containers" which cookies and login info don't cross. By default, Facebook is separated into its own thing.
Try librewolf browser same Firefox but "ungoogled"
Linux (Ubuntu could be a good start), own NAS drive or a service like Mega for a shared drive, and Protonmail/Tutanota could be good options. There are probably more online shared drives you could look for if you don't want to use Mega.