My home fellowship was CoDA, Mike, I went to a terrific meeting in Toronto for 8 years before we moved north.
We has about 30 members most meetings and many double winners as well (also belonging to AA or NA and addressing their own codependency as well).
It truly was about us, substance wasn't an issue. Many members who found themselves very codependent had issues unrelated to substance of any kind.
That said, Alanon and Naranon are about us too and are very similar to CoDA and to each other and we have members here from all three fellowships.
The important thing is that you are giving meetings a try. Give yourself a chance to get used to them and try several different meetings to find the ones that suit you best.
Please let us know how you make out. It's a good thing you are doing for yourself.
HUGS