How long would it take for someone to loose 6 stone?

New year, new start. I want to loose as much weight as I can. I am definitely not happy with my weight ,and never have been. I was born big ,but tbh that's no excuse.
I want to get started as soon as I can.

What's the best exercises?
Best diet?
How long?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).