You can only climb one mountain at a time.

My mountain is finish writing my book.

And this mountain requires me to scale 4 hours per day.

I'm not even close right now.

If anything, I need to build up in the following way:

2 hours/day — September.

3 hours/day — October.

4 hours/day — November.

Sustain the 4 from here on out — December.