Use 21.5" 2011 iMac as Monitor for windows laptop with thunderbolt 3 output?

I own an old iMac from 2011 which I no longer use that much but the display is still nice and I would like to use it as an external monitor.

I also own a lenovo yoga 720 running windows 10 which has a thunderbolt 3 output, from my research older standards of thunderbolt could allow pcs to use these old iMacs as external monitors. It also seems thunderbolt 3 is backwards compatible.

If i found an adapter that converted thunderbolt 3 to the thunderbolt of the iMac, would I be able to use it as an external monitor? What would I need to do to get it working or would it simply be plug and play?