Hello JohKe,
Here's an overview:
1) Browsing behaviors: you need to focus on not following "unsafe" links, not downloading "unsafe" files, and not installing "unsafe" software. These will lead to scams and malware. Technologically, you can use uBlock Origin and MalwareByte Browser Guard to help, but it's really up to you to learn what is unsafe. Anything sent to you unsolicited are often no good. Google ads are really bad vectors for spreading malware and scams because they look legitimate. Even google results are sometimes bad.
2) Your computer, probably a Windows 10 and Windows 10, will normally come pre-installed with Antivirus software and Firewall, which are already OK. You do need to know that these won't catch everything. It's again up to you to figure out what behaviors are safe.
3) If you are using a Wifi in your home connected to a carrier router, your home is already fire-walled by the router. So you are most likely OK here too.
Edited by Dill2046, 08 April 2024 - 10:52 PM.