How do I make SafeSearch work for everyone on my network? [closed]

I want to make sure that everyone using my Wi-Fi can only see safe Google search results (or even in my own device).

I heard you can do this by changing some settings to send Google searches to a special SafeSearch address (using an IP like 216.239.38.120).

Can someone please explain:

What is the easiest way to do this for all devices in my home?

How can I change it just on one computer if needed?

Are there any problems I should know about?

Is there a better way to make sure SafeSearch is always on?

Note : I cant change my router’s DNS (I tried inspect and console trick and it dont work)

Thanks a lot!