How to collect information from visitors in Dreamweaver?

"I want to know if it is possible to create a fully functional website like Nike... I am new to coding and Dreamweaver."

Tools don't make websites, people do.  I think a Nike Store or any e-commerce site is a good advanced coder's project after you've developed some experience.  But it's not a good beginner's project.  We must crawl before we can walk.  If you're in a hurry use a 3rd party CMS like Shopify or Wix.

Sign-up for a MailChimp account.  Generate your sign-up form on their site and embed their code into your HTML document. When people use your sign-up form, their names are added to your MailChimp mailing list.

https://mailchimp.com/help/getting-started-with-mailchimp/

Also due to strict privacy protection laws, you must tell your site visitors what data you're collecting and how you're using it.  Otherwise your site could incur fines for violating regional laws.  As an example, see MailChimp's Privacy Policy.

https://mailchimp.com/legal/privacy/

You collect information from vistors through a form you create on your website. Email sign up being the basic entry point if you want to collect users email addresses so you can store and use them to send out newsletters, product updates etc.

Anything can be created in Dreamweaver, its just a code editor. You need to know how to code to produce complex solutions. There's nothing in Dreamweaver that will automate the process.