I completely understand, and am right there with you. I don't see well enough to use a smart phone, and the whole world operates on them. So I am at such a disadvantage by not using one, but I do use my laptop and desktop, and love the bigger screens so I can make the print big enough to read. I don't know how to help with the white screen and spinning circle, but I have seen them, and don't remember how it was resolved. Have you tried rebooting? Turn your computer off and wait 5 minutes. Then "boot" (start) it up again. It is amazing how much rebooting fixes!
(Do you think that word came from people kicking their computers? haha)