I would suspect MS would make sure it can't use Outlook, but never tried,
I having used Thunderbird with Linux, so that never phased me in anyway.
On older machines that will not run the new flavour Outlook I have so far found the few people involved, have accepted Thunderbird once I had reset up their email accounts on it. Or they have not told me!
There will be some changes to the apps you use, but these ought to be easy enough to pick up given a will to invest in doing so.
If the printer will not interface then aft.er dealing with suff on the Chromebook send it to the DELL for that final function