I am a long-time listener, first-time caller.
long-time listener, first-time caller
idiomA person who contacts the host of a radio program, or (by extension) the owner of a website etc., for the first time, having listened or followed for a significant period.
The host smiled when the guest said, I am a long-time listener, first-time caller, and I have a question about your latest episode.
After years of following the podcast in silence, she finally gathered the courage to reach out, introducing herself as a long-time listener, first-time caller.