Here are three recommendations for new leaders starting off:

Programs

https://www.buymeacoffee.com/pmpexamcoaching/extras

CAPM/PMP Study Group

https://projectcertifications.com/study-group/

YouTube

https://www.youtube.com/channel/UC-8Li_ETRLH49DcRgnx3u9g

Agile Basics Course

https://www.udemy.com/course/agile-basics-for-capm-exam/