The phrase "enthusiastic advocate" refers to someone who strongly supports or promotes a particular cause or idea with great passion and excitement. Full definition
Needless to say, we have become enthusiastic advocates for school culture because we have experienced its positive impact. (barkleypd.com)
And then these grandparents become enthusiastic advocates for baby sign language. (wordsbythehandful.com)
About parents being the best teacher — not like teachers in school, but more about the parent knowing the child the best and being the most enthusiastic advocate for anything they do. (amotherinisrael.com)