HELP ME!

I'm New to This Website, Recently i Saw, My Friend Selling Insta, FB, Tik Tok Accounts, But He Started Recently, Don't know how he getting subs/followers so quickly. he's not telling his tricks or secret.

I want to know this website provide that knowledge or someone can provide that knowledge.(Sorry for bad English). I know to Create webiste using Html/Css/Js.

You can either buy accounts from the marketplace
https://www.blackhatworld.com/forums/#the-marketplace.73or learn how to create accounts
https://www.google.com/search?q=site:blackhatworld.com+create+accounts

I would suggest you to visit the related forums of all the social media platforms. You can learn a lot from them about each social media platform. Furthermore, you can also sell in BHW Marketplace if you've got some services to offer.