I have a Linux (Mint) laptop and a non-rooted Android (13) phone which I take to college, and also have a personal and a college Google account, both of which are essential. The emails of both the accounts are nearly identical, only differing by their domain name, and I am afraid I may mistake one for another and end up storing data in or using the incorrect account for a task. What measures can I take to keep both accounts isolated and ensure I am aware of which account I am currently using without resorting to purchasing separate devices for each account or rooting my devices?

Do note that this post only addresses the issue of keeping separation between the two accounts, and not directly the issue of invasion of privacy of use of these Google services, which is why I didn’t ask this question in c/privacy.