Urgent - need to buy treadmill - - diabetic

Urgent - need to buy treadmill - - diabetic
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My doctor says I am a borderline diabetic.
I have to do at about 45 minutes of exercise every day.
Because I have a knee problem I cannot use an elliptical exercise
appliance
I am about 53 years old.

I have NO clue about treadmills.
Can anyone pls help me ?

What treadmill should I buy ?
What features should I look for ?
What horsepower ?
What brand ?
Will I need to get an electric one ?

I am probably not going to run...but probably walk very fast on it.

I think "Basic Display info" like ... time spent, amount of calories
lost etc. is probably what I definitely need.

I would like to get one that is not too heavy and noisy.

Any help / pointers would be highly appreciated

Thanks,
Ayesha Hill

I understand you now need to exercise. If possible, you should forget
about treadmills for now, unless there is one at your local community
center. They can usually can be used for free. By the same token, you
could make friends over there which might stimulate you to go back.
Treadmills are extremely boring, in my opinion. How about walking fast
outside? Treadmills features like calories lost, time spent, etc.
don't matter.