Regularly update your Android phone's software to maintain optimal security against hackers, as out-of-updated phones are more likely to get hacked.
Make different passwords for everything. Reusing passwords for gaming and other accounts is okay, but not for important things like online backing etc.
Install antivirus for better protection against malware threats and viruses which may destroy your personal data.
Avoid downloading apps and data from untrusted sources as it may be spam or contain viruses.
Use VPN for internet surfing as it allows safe browsing and protects from untrusted sites.
Avoid connecting to public WiFi because it is a hacker's favorite spot for catching victims, as it lacks important security.