"read scripts before you run them" is a good bit of advice. Some little things can help you protect your GUI apps if you're extra paranoid (eg. Wayland is more secure, Flatpak offers additional sandboxing with bubblewrap) but not everything is necessary.
If you use a mainstream distro like Fedora or Ubuntu, its default configuration should be safe enough to use like Windows. Just remember that there isn't really any antivirus or Microsoft Defender to save you if you really mess up. I do offline backups of important work on all my devices, for this reason partially.
If you use a mainstream distro like Fedora or Ubuntu, its default configuration should be safe enough to use like Windows. Just remember that there isn't really any antivirus or Microsoft Defender to save you if you really mess up. I do offline backups of important work on all my devices, for this reason partially.