Just use gmail through the browser instead of installing stuff like the gmail app on your phone, and you can have it forward it to your email so you don't need to open gmail to get school mail. You'll probably just need to login for replies.

And when it comes to work in the future hopefully you'll be a provided with a work device. I wouldn't use a work device for personal use even if it were running Linux, and wouldn't install work related programs on personal devices. I just consider work devices and programs to be spying on me as default.