Check out your local library for storytime! They usually do different age groups.
I was just going to say we started with storytime twice a week at the library. We also do play group one a week. Considering swim classes soon. I’ve seen movement classes for that age range too
My son loves the baby gym. They meet once a week and he gets to interact with other kids and play and be social.
The YMCA has swimming and gymnastics. I go to the ones with an indoor pool. They are in the jacuzzi rather than the pool. Gymboree. Sky zone
Following! I’m in SE Michigan and wondering the same thing! I’ve had my daughter in swim lessons since she was 9 months old, but that’s really the only socialization she gets other than with family!