Welcome to the boards! I am not 100% sure what issue exactly you are facing. Can you maybe provide screenshots in case the following are not helpful?
If it is regarding the "type" of LabVIEW the loading screen is showing, don't worry about it. Both the myRIO-labeled and the non-labeled "versions" have the same features, the only difference is in the default selections (e.g. when starting a new project) they offer you. So the myRIO-label refers more to a user interface setting rather than different versions. You can also change the setting manually, see: Why Does the Version Panel Indicate myRIO? (I haven't installed the myRIO package on my LabVIEW 2018 though, so I don't know if it has that as well).
Does this answer your question?
Thank you for your quick reply! It seems to me that your LabVIEW installation is somehow completely missing the myRIO toolkit.
Have a look at Can't Find the myRIO Project Templates in LabVIEW to find the correct installation order, and which components are needed.
This is the download for LabVIEW 2018 myRIO Toolkit, in case you haven't got it yet.