Content all on the one channel or in 2 separate channels?

[TheGuitarZone]

Hi everyone, recently I started making youtube videos. I have 2 different channels, one for guitar Backing Tracks and the other one just for guitar lessons. And I'm wondering, should I put all the Backing Tracks and lessons on one channel or keep things as they are by having them on two separate channels? Now the goal eventually is to build up as big an audience as possible that's hooked on my content, monetise and make as much money as possible. So should I put everything on the one channel? Backing Tracks are quite a niche area so maybe they should be on a separate channel but because it's related to guitar playing would it be better to stick them on the same channel as the lessons? I guess it would be easier to monetise quicker as there'd be double the content and I'd be able to upload twice as frequently every week or should they be on separate channels? Here are the two channels.

Backing Tracks: https://www.youtube.com/channel/UC9B1OoZbAJgXx0lcnzT9tGg
Lessons: https://www.youtube.com/channel/UCG1eSqvrUS_BIvyTsz_46lA