Here are a series of videos to help learn Byzantine Notation. Use them in order:

1. The first three are short and are for those familiar with Western music: https://www.youtube.com/playlist?list=PLjlIBiUbfJgjSbhWa5ccq1U-si2vrdKFS

2. Beginners – https://www.patriarchalpsaltophiles.org/

3. Next is Intermediate/Advanced and covers the Αναστασιματάριον, the downside (if you only know English) is that the Instructor teaches in Modern Greek, the upside is once you’ve gone over 1 and 2 above you will be able to read the notes and chant the music he goes over, even if he’s teaching in Modern Greek. The Αναστασιματάριον covers all the music/tones used on Saturdays and Sundays: https://www.youtube.com/playlist?list=PLm5vI-k8ounzOPiZaDSGP3nCDKUCf5ZTG

4. Automela/Prosomia

5. Useful knowledge: https://almoutran.com/2011/07/3870/