New to area, South Arlington

Hi everyone my husband and I have been in south Arlington for almost a year but I watch children from my home and have had a hard time getting out of house and finding new places and friends. I am now 12 weeks pregnant but would like to find classes that would keep me active and help make friends. Would appreciate it if you could let me know of any fun classes in area. Whether its exercise or just fun creative classes that would be awesome. I am a very creative person so anything like that would be fun.