Is it Okay if I start all three 30 day beginner course together?

Is it Okay if I start all three 30 day beginner course together?

Yes! If it is what u want then sure but I reccomend is start off with one then finish it then try the others

I thought they were basically all the same content, just with different styles and / or gender? 

To clarify: my course is recommended for soprano and alto voice types. Jonathan Estabrooks covers the same material for lower voice types (for tenors and basses).

Jon Statham's course is not built from the same outline; his focuses more on singing from an instrumentalist's perspective (for example, learning to sing different scales).

Thanks for the clarification.

You're welcome, Tan!