According to Cybersecurity and Infrastructure Security Agency (CISA):
Think before you click: recognize and report phishing
Update Your Software: Don’t delay — If you see a software update notification, act promptly.
Use Strong Passwords: Use passwords that are long, unique, and randomly generated. Use password managers to generate and remember different, complex passwords for each of your accounts.
Enable Multi-Factor Authentication: You need more than a password to protect your online accounts, and enabling MFA makes you significantly less likely to get hacked.
For more information about computer security, read these titles:
Beaver, Kevin. Hacking For Dummies.
Coombs, Ted. Cloud Security for Dummies.
Crawley, Kim. 8 Steps to Better Security: Simple Cyber Resilience Guide for Business.
Steinbery, Jose. Cybersecurity for Dummies.