How to avoid getting my Apple Account compromised?

Email account with which provider? Change the password on that account.

Read this document if you think your Apple ID has been compromised. --> If you think your Apple Account has been compromised - Apple Support

For iOS 15 or earlier, if you want to see if anyone else has access to your device or accounts, click here --> Checklist 1: Limit device and account access - Apple Support

For iOS 16 or later see how Safety Check on iPhone works to keep you safe. Safety Check for an iPhone with iOS 16 or later - Apple Support

Use the information in this document to check your Apple ID device list to find where you're signed in --> Check your Apple Account device list to find where you’re signed in - Apple Support

Related materials:

Personal Safety User Guide

Personal Safety User Guide - Apple Support

> open the Table of Contents and review the articles

A document with general information about security and your Apple ID --> Security and your Apple Account - Apple Support

Contact Apple for help with Apple ID account security. This page provides country-specific Apple Support contact information ➞ Contact Apple for support and service - Apple Support

See this on how to regain control over a compromised apple account

1. Change your Apple Account password. Make sure that you use a strong and unique password.
2. If you can't change your Apple Account password because it's already been changed by someone else, reset your password.
3. Go to account.apple.com to update any of personal or security information that isn't correct or that you don't recognize.
4. On account.apple.com, select Devices and remove any devices associated with your Apple Account that you don't recognize.
5. Check with your email provider and cellular carrier to make sure that you control every email address and phone number associated with your Apple Account. For example, check with your cellular carrier that SMS forwarding hasn't been set up for a phone number associated with your Apple Account.

See this link for further reference

If you think your Apple Account has been compromised - Apple Support