I'd suggest you go to songtown.com and do some reading. I have no affiliation there but the two guys who own and run the site are bonafide top tier hit songwriters in country and pop. And they have recent enough credits to be up to snuff on what's going on in the industry today. There's also Taxi and Songtradr but they seem to cater more toward tv/film music.

My experience pitching is outdated. The music industry is much different than it was 30 or 40 years ago. So the few modest successes I had were in a different world. I'm proud of my Billboard Recommended Single and my #84 on the Cashbox Hot Country Chart but it was so long ago the way I did it is not going to help today.