New to racing leagues

Hi folks,

A buddy and I are looking to get into a casual racing league, he is just starting out in forza (finally swayed him from NFS) and I do have some experience but have been away from the scene for quite some time so we aren’t super competitive. We would like to use lower class cars I prefer vintage but am open for any type. I was wondering if you could point us in the right direction for groups doing things like this