1. Change User Name: The first important fact you need to notice for your site security is “Admin User Name”. If your wordpress (wp-admin) “username” is “admin” please change it to a different one.
2. Password Strength: Please make your password more strong. For example joy-mpp*#bD@23 Or x^87F7O5p}#4TF6 something like that. This will make your password more strong and secured.
3. WordPress Version Update : Please always keep your wordpress version updated . Because, wordpress generally solved the previous issues in the latest version.
Please keep in mind, take a backup of your wordpress site (wordpress +database) while updating.