Visit https://twitter.com/ and follow the steps to sign-up for an account.
Twitter provides the following best practices resource for adding information to your page: https://business.twitter.com/basics/create-a-profile-for-your-business
Twitter Business page creation is included free for all customers, however, please note:
You must provide us a valid email address to use when creating the account. Twitter will email you a confirmation link that must be confirmed by clicking the link.
If you signed up for a growth/audience builder plan with us, your account must have a confirmed phone number added to the account.