One year of experience is just one year of making game. So if you quit at some point and start to make game later, the sum of the time you spent doing that (not counting the gap) will be counted for example.
We don't want to be to strict, as we want to create a chance for as many people as possible to have fun working on their games. So as long as you still consider yourself as beginner, then you're welcome to join! 👍