I am considering getting a walking pad. I want to get 10k to 20k steps a day and its hard with my job

Something like this https://imgur.com/a/ZHM2mpx

I have some concerns though.

1.Doea this cause any pain as compared to walking on the street? Am i more likely to develop injuries walking on this walking pad as compared to the street or a treadmill? My feet are kinda sensitive and i have noticed that i develop pain in my foot if i walk too fast for example.

2.i have a small studio so i am wondering if this will take too much space.

3.Are theee things hard to assemble? I am not very good at assembling stuff and i live on my own.

4.Are these walking pads noisy? If we talk normally in my studio our neighbors can hear us speaking. I am wondering if it being noisy will deter me from using it

5.is it comfortable to walk on such thin walking pade? I know they wont be like treadmills but will they cause injuries?

6.Can the walking pad damage the flooring? My studio has woooden planks on the floor

7.isnt this too small, narrow for a 5'11 man?

Reasons i want to buy

1.With a full time job its hard for me to go outside multiple times a day but if i walk around my home i develop knee pain due to turning often in limited space. So a walking pad would get me 10000 to 20000 steps a day.

2.its cheap

3.ill be more comfortable to walk whenever i want even if its lunch time or early morning. If i have to go out i have to change my clothes, wear socks, shoes, jacket. And then take a round of the neighborhood

Also do you have any reccomendations that i can easily buy in the netherlands?