https://www.emmanuelmusic.org/bach-notes/bwv-2
Here you will find notes on the many cantatas of J.S. Bach that Emmanuel Music has performed.
emmanuel musicnotesbachcantatas
https://aureacapra.com/product/bach-cantatas-violin/
Bach Cantatas for violin accompaniment backing tracks. Six Arias from the Cantatas for two violins and piano or organ with play along backing tracks.
js bachfrom thesixariascantatas