Have you looked at the cost of having a pro account? If you love it maybe it’s worth paying for. It’s £14.39/month and enables you to have meetings that last as long as you like and with groups. As you say, if you change to a different system it will take time to learn how that platform works. It might actually be more cost effective to stick with Zoom and pay the monthly fee if you’re used to the set up. Having said that if someone else comes up with a free version of something else that’s as easy to use then it would be interesting to know. Good luck!