The next great local music resource I found was CPR station Indie 102.3 FM. Every month DJ Alisha Sweeny compiles a list of local musicians to highlight on the radio. That can be found here: https://www.cpr.org/indie/local-303/
On the last Monday of every month, Indie 102.3 hosts the Local 303 Meetup that includes time to talk with local musicians and includes a free performance by one of the highlighted artists!