How long does it take to gain confidence?

Question

How long does it take to go from being very insecure to very confident? Is being a confident charismatic person something that can be learned and gained through repetition?

Answer 1

It starts in your childhood. If you’re not confident from that point, you’re screwed now. Sorry. 

Answer 2

Is the check in the mail...???

Answer 3

It is an unending learning experience and you can start anytime.