Mac mini: Clicked suspicious link, what next?

Hi all

i have a Mac mini. In a moment of not concentrating, I clicked a link in an email without checking the sender.

It took me to a website that had ERROR across the top. I immediately closed the browser and deleted the email.

I then disconnected the internet connection.

Changed the master password on my password manager, apple account, banking & super accounts.

Do I need to do anything else? Should I be installing a malware thing to remove any malware that may have been installed?

I do have a Norton Subscription not yet expired, but I had removed it as the Mac was running super slow from it. Should I reinstall it? Or is there a better one?

please be kind - I’m already beating myself up as I’m normally absolutely diligent with this stuff, and the email was about Amazon Prime which is due around now.

thanks!