From now on, I’m not even connecting to the families home WiFi
What are common things to look out for?
The first thing that comes to mind is keeping the default credentials for router settings.
I feel like a boomer, but why is this dangerous? Why is the default randomised string of numbers, letters and special characters easier to guess than if I generate an other random string?
On older models these often weren’t randomised, even now that they are on most models the passwords tend to be short which is easier to brute force.
If you’re using your ISP’s supplied router they, and anyone who compromises your ISP, potentially have a back door into your router.
I recommend pfsense routers. It’s open source, has features missing on practically all consumer routers and they’re very reliable.