I'll start, but please join in, or ask questions and someone might be able to help out....
These are aimed at Teams:
To stop students starting meetings first, or throwing each other out, schedule the meeting and then click on it in your calendar.
Scroll to the bottom and click meeting options. A page will open where you can select 'Only me' for Who can bypass the lobby?, and 'Only me' for who can present.
You can also stop students from posting gifs etc by clicking Manage Team, then Fun Stuff and turning them off.
In general, I found two screens really helpful so that I could share screen 2 (extended desktop) and drag things across.
I also bought a second webcam and a flexible arm (like that on an angle poise lamp) to use pointing down a at a whiteboard or the desk if I wanted to demonstrate something. You can switch between the two cameras in Teams, so it's a godsend.