The Beginner queue has the fewest leads of any queues. You may find that the system will remove you from the queue often as leads run out. Just keep rejoining the queue and try to make calls. It's a bit annoying, but once you've made enough calls to show us you know what you're doing, you'll be able to move on from this queue.
The good news is, it doesn't take too long to get out of the Beginner queue and join the Advanced queue. Our team will review each of the calls you complete. When we're confident that you've got the hang of the platform and are ready for more complicated calls, we'll add the Advanced badge to your profile. At this time, you'll be able to complete a couple more badges, then join the Advanced queue where the majority of leads are.