If you’re new and want to convert DBX to PST, just follow these simple steps:

First, install a reliable tool like SysInfo DBX to PST Converter on your system. Once installed, open the software and click on the option to add DBX files. You can either select individual files or an entire folder. After adding them, take a moment to preview the emails to make sure everything looks correct. Next, choose PST as the output format and select where you want to save the file. Finally, click on the convert button. Within a few minutes, your DBX files will be converted into PST format without losing any emails.
Read more: https://www.sysinfotools.com/recovery/dbx-to-pst-converter.php