You have to be at member level 2 before you can sign up for the co-op runs. You do that by being active on the site. Read as many posts as you have time for, use your likes, post comments, start a thread.
Here’s the skinny on the co-ops, how they work, and how you can participate.
About the Seed Runs Co-op ⚠ Read before you participate
Look forward to seeing your name on a list before long.