After home dashboard, you can see updates on the left side options. If you click updates you can see this
First, it shows when last checked it will show you the date. So if there is an update available you should update. Here you can see
You have the latest version of WordPress. Future security updates will be applied automatically. So now you have the latest version, therefore, no update option is there, if update available you will find a button just click update and WordPress will update automatically. WordPress is a user-friendly content management system so it’s not hard or difficult to upgrade as other content management systems. Then after this, you can see two sections more and these are
If you can read the message there, Your plugins are all up to date and Your themes are all up to date. So there is no update available. If any update available you will find there and for themes and plugins also just one click need to upgrade. But always make sure you have the backup for your WordPress in any safe place before the upgrade.