Overview
To begin using Wikibase.cloud, you need an invite code that will allow you to join the closed beta service. You can request one using this form. You may also be interested in joining the Wikibase.cloud Telegram channel.
Activating your invite code

After you've received your invite code, click the "Sign up" button at the top right of the Wikibase.cloud home page.
Fill in the form

On the account creation page, fill in your invite code, your email address and your chosen password. Once you've checked the box agreeing to the terms of use, click "Create account".
Verify your email

After that, check your email. You'll receive an email from the Wikibase Cloud team with a button labeled "Verify Email".

Click the button in your email. If you have dfficulties or if the email doesn't arrive after a few minutes, return to your web browser and reload the page, then click on the big red button that reads "Email not verified" to trigger another email.

When you've successfully verified your email, you'll be greeted by a confirmation message.
Return to your dashboard

Return to your web browser and the Wikibase.cloud home page. on the Wikibase.cloud dashboard, you'll see that you can now create a wiki.