To read or send messages, you will be able to access your email, with the email platform of your hosting company (often called Webmail). The link should be on the hosting website as well as on the email confirming the creation of your new address.
You can also receive and send your email from your mail application on your computer and cellphone.
To do so, you will need a few pieces of information. When you will create an account on your hosting company, you should receive an email with your account information, including your SMTP, POP, and IMAP. Those pieces of information will be required when you will add an account to your applications.
For your cellphone iPhone, you would need to go to Settings, then Passwords and Accounts. Then click on “Add an account”. Select Other, and “ Add an email account”. Then follow the requirements that ask you to enter your name, your address (email address), password and description of your new account, such as Professional emails. The next step will be to enter your POP, SMTP and IMAP information.
You should be set to send and receive your professional emails.