Writer Amin R wrote:
I want to contact the client by mail. Is that possible?
Not until the client has hired you and even then only if the client allows you to do so. Until you have a contract, you may only communicate on Upwork.
Is your first name "Writer"? Your name must be your real name as it appears on your ID documents.
As a freelancer, your only contact with clients is by sending in a proposal when you see a job advertised. You can't see their accounts. Once you start a contract with a client, you're free to contact them by any means, either on or off the site.