Newbie help Suggestions win10 to win11

Hi everyone, First at home. poster here. Apologies if this has been answered.

I currently have 2 PCs and a laptop all running win10 at home. None are win11 capable. I loath the idea of replacing these relatively new machines so it got me thinking, can I install an inexpensive PC running win11 to act as a "gateway" (intermediary) with the internet so that it's security shields my win10 machines from the security threats that will occur after win10 expires? Is this possible? If the answer is yes I'll be looking for the ways and means. Thank you very much!