Hello,
No worries. On that Microsoft 365 page, do not choose the big Start trial or Confirm button. Look for the small link that says No thanks, Skip for now, Maybe later, or Continue without subscription. It is often at the bottom left or under the main button.
Click that, then confirm if you are asked, and Windows setup will continue so you can finish creating your account and reach the desktop. You can always install Microsoft 365 later from the Microsoft Store or office.com if you decide you want it.
If you do not see any option to skip, tell me the exact text you see on that screen and I will guide you.