As @fernan mentioned, check your Messages, found by clicking the Envelope icon under your Avatar in the top right corner of the website.
Once you're there, open the Message with the subject Greetings!, automatically sent to you by BPbot when you registered.
Following the instructions presented to you by BPbot to get started with the new user tutorial. For anybody that doesn't have the Greetings! message, simply send BPbot a new message with any subject and the following message: @BPbot start new user
You should receive a reply almost immediately to get started.