Linux can be chatty, but I'd recommend installing OpenSnitch to get a handle on the few phone-home calls from programs like snapd (if you choose to not neuter it, immediately) and distro-specific upsells like "ubuntu-advantage".
The biggest pay-off for OpenSnitch is if you're going to be installing and using third-party programs like VSCode and Unity, who love to talk to analytics providers.
The biggest pay-off for OpenSnitch is if you're going to be installing and using third-party programs like VSCode and Unity, who love to talk to analytics providers.