Log in
You sign in on your workspace itself, with your passkey or with your phone: it shows the request and you approve it there.
Open your workspace
Continue
Open the workspace address you received when your workspace was created: the link in your sign-up mail takes you there. The setup guide shows how to connect this computer.
Your workspace is somewhere else?
Find the workspace address you received when it was created, then open it on this computer. The setup guide walks through connecting one.
No workspace yet?
Then there is nothing to log in to yet. Create your account — it takes an e-mail and your phone.