In order to create a new email address in Gmail:
1. Go to www.gmail.com.
2. Click Create account at the top right corner.
3. The sign-up form will appear.
4. Fill out the form with your username, first and last name, password, birthday. And click Next when you're done.
5. Select your gender and region then click Next.
6. Accept the Privacy Terms and Terms of Use.
Read this comprehensive guide: gmail sign up 2020 tutorial.