Make sure you got the right link
Links are unique to each webinar, so if you've got multiple webinars, make sure you've the right one. When you enter the studio, the name and time of webinar will be there for a double-check.
Giving access permissions and setting things up
Before you enter the studio, you'll see a setup screen where you can configure your setup. Your browser should ask for the permissions automatically. If it doesn't, you can read here how to troubleshoot it.
Now fill in your name and position and you're good to go. Click on enter studio to enter the studio. No sweat, you won't go live yet.
π‘ You can show your name on stream, this is what it'll look like. Get creative.