This guide explains how to create a Bing Ads account.

Then click on "No account? Create one". Marked in red below.
Follow the steps in the login process and save your data properly. After this, the account has been created. At the bottom, you can optionally tick whether you want to receive the newsletter for Microsoft Advertising. After filling in your details, click on 'Create account'.
Your account has now been created. On the next screen, you will be asked to set up your first campaign. Skip this by clicking on 'Skip campaign creation' to click. Marked in red below.
On the last screen, you need to fill in the company and payment details. After filling in the details, click on 'Save' and your Microsoft Advertising account is now ready to use.