Hi Dekland,
I'm Christine, an Independent Advisor. I can see here that you're unable to access Microsoft Store on your School laptop. This issue occurs when the work or school account have removed the ability to use the MS Store on their devices. Since you are using a school laptop and your school account is connected to it, you will be needing to reach your school IT Support and ask if it's possible to remove that configuration or if it's okay to remove your school account temporarily for you to use the MS Store.
Thank you,
Christine L