Furthermore, what's to stop the two new workers from democratically voting me out of the operation, keeping the store, name, brand, and equipment for themselves?
Depends on the bylaws you set up.
In most Co-operatives, there's a time period where a new employee is not given an ownership stake. Then there are specific procedures that layout that a member can only be removed if they have been found guilty of X number of misconducts over time. And even then, the bylaws usually try to remedy the situation before requiring a unanimous (minus 1) vote in order to remove the person.
It's doable: https://vijayprema.com/using-lemmy-from-my-existing-mastodon/
The Tusky android app let's me browse lemmy.world communities.