Create an account with email or Google, verify it, and choose a username. Search that username from another account to send a friend request. Accept the request to open the chat.
The website text chat is separate. It asks for a name and a gender, then finds someone who is also looking. Claim the account if you want that chat, and your tokens, on your phone.
Messages and locks
In a thread, use the attach menu for a photo, video, voice note, or file. GIFs and emoji have their own pickers. Save a file into the vault from the chat if you want to keep it.
Set an app-lock PIN in profile, and a hidden PIN if some chats should leave the list. The privacy-locks and hidden-chats help pages are the step-by-step versions.