Thunderbird is a mail client. It does not issue you an email address, they are provided by the likes of GMX, Google, Outlook and Yahoo among a host of others.

What you do is add your existing address to Thunderbird to mange it locally rather than in a browser.

hello how can i access my email here ?? what steps to follow

Hi, I hope you are doing well. Regarding that matter, please provide your email address and password to check back after a few minutes. We will get back to you as soon as possible.