Children activities

I’m feeling like a super bad mom. My baby just turned 1 but he barely gets to interact with other kids, he has maybe 5 times. We’re looking into group swim lessons but that won’t start for a while. I’m a SAHM and i don’t have any friends to go out with to help him get interaction with other people besides me and his dad. I’d love to find activities for us to do that would give him time with other kids. does anyone have any ideas besides swim lessons?