A portable Light weight Hover (Liverpool L6)

Please Iam looking for a lightweight portable hoover bagged or bag less must not be too heavy as I do have stairs, and I suffer with a Neurological condition that effects my muscles and my back, I will consider anything to clean the house with, but if I can find one that is small and not too Large for moving it around, that would really be great, my house gathers a lot of dust, just open a window to get some fresh air and it all blows inside my house, from outside, it’s incredibly dusty, well I would really appreciate any help with this, and I would be very thankful to you. Please contact me if you can help, Thank you Laura in L6