DEPRESSION PODCAST : How long does it take for chronic depression to cure


Hi there,
How long does it take for someone who has experienced chronic, 19 yrs of depression, to become a happy, high functioning person IF he/she does everything mentioned in the depression podcast everyday?
I have been practising almost everything mentioned in the depression podcast everyday for a little more than two months until today. It’s hard work, therefore, I would love to know the estimated time scale for someone like me to overcome depression. I really want to know expert opinion about how long it will take.
If an estimated time scale can’t be given how do I deal with the uncertainty of this because it’s very exhausting and I need an estimate of time for motivation.
Thank you. xoxo