How to use TikTok? TikTok Tutorial
You can get the TikTok app from the App Store or Google Play.
 To get to your profile, open the app on your phone and tap the "Profile" button. This button is in the bottom right corner of your screen.
 Pick the best way to sign up. You can sign up with your phone number or email address, or you can use your Facebook, Google, Apple (for iPhone users), Instagram, or Twitter account.
 Then, type in a password that you will use to log in to TikTok. This should be safe, easy to remember, and closely tied to your brand.
 You now need to choose a username for your account. This step is crucial because this name will be huge at the top of your TikTok profile page. It also works as your TikTok username. You should use your real brand name so that people can find it.