Delete everything and reinstall, iMac (Retina 5K, 27-inch, Late 2015, macOS Monterey 12.7.6

[Galuten]

Hi,help,,,I want to delete everything and reinstall. I have an iMac (Retina 5K, 27-inch, Late 2015, macOS Monterey 12.7.6.have found this guide.shutdown and start in Recovery Mode: Shut down your iMac completely. Then turn on the computer by holding down the Command (⌘) and R keys at the same time until you see the Apple logo. Select the Recovery Menu: In the Recovery Menu, select "Disk Utility". Erase your hard drive: Select your hard drive (usually Macintosh HD) in Disk Utility. Click "Erase", then select "APFS" or "Mac OS Extended (Journaled)" as the file system. Reinstall macOS: After the hard drive is erased, close Disk Utility and select "Reinstall macOS" from the Recovery Menu. Follow the instructions: Follow the on-screen instructions to complete the installation of macOS,,when I am inside disk utility, I have Macintosh HD devices, there are 2 Macintosh HD and Macintosh Data, should I delete Macintosh devices?.or only one of the 2 HD or HD data?,,,Is there anything else I should be aware of?

 

[Rodananne]

Follow this;

Use Disk Utility to erase an Intel-based Mac - Apple Support

How to erase (format) the built-in startup disk of an Intel-based Mac.

support.apple.com