Your website is off until you publish it — so you can build it in private and switch it on when you are happy.
Website ▸ Settings ▸ Status. Switch Published to Yes and save. The first time you do this we build you a starter homepage with a hero, your programs and a schedule, so you are editing a real page rather than an empty canvas.
Website ▸ Settings shows your Members Log-in Link and Sign-up Form link with a copy button. These work even if you keep your existing website elsewhere — put them behind buttons on your own site.