We’ve been using Zoom in much the same way as you intend, yes, back to back meetings are possible, it runs on Mac, Windows, iPads, Android so pretty well everything. As an organiser you’re best off running it on a computer as opposed to a phone/tablet as you can see all of the participants at one, the mobile versions can only display 4 windows at once. Easy enough to register yourself and set up meetings. I first used it at the beginning of lockdown & I find I like it a lot.