Before updating WordPress, it's important to backup all files as version updates can sometimes result in the loss of some files. Additionally, make sure to regularly update plugins by simply clicking "update now."
For more details on WordPress 6.5.3, click the following link:
https://wordpress.org/news/2024/05/wordpress-6-5-3-maintenance-release/
To download WordPress 6.5.3, use the following link: https://wordpress.org/download/
For the installation guide, click on the following link: https://developer.wordpress.org/advanced-administration/before-install/howto-install/