I started in a similar place, and am not very far ahead of you. I got 5 chicks off of Kijiji which all turned out to be pullets (good type , poor coloring) and then I became obsessed with the breed, so bought a young cockeral off a breeder (which turned out not that great either). I lost 2 of the original 5, but added some of their chicks. I am up to 9 hens and 2 roosters, some good, some "meh", but nothing that would be disqualified at a show. I'm terrified of something happening and losing some birds and having to start again, thats why Ive kept the "meh" ones this long. This year I have my favorite rooster separated with 3 hens (was 4 hens but reduced for quality) and bought an incubator. I plan to try to hatch and grow out at least 20 chicks from this particular group, and then cull.
Definitely get a copy of the SOP, talk to Ameraucana people on this group (so many are willing to help!!!), study the galleries and show results photos. Breed the best of what you have, build your stock up, (or purchase a nice trio), hatch lots, cull lots. But this is just advice from a newbie too