Either import Excel items as Group, or promote Items to Group level on Board?

I am a new possible adopter of Monday.com. I have a massive litigation practice management database that is a relational database. I want to be able to export parts of it into a CSV file for Excel to import, and then to import from Excel to monday.com. However, what I would like to do is have the individual rows in the Excel spreadsheet become Group Names on a board. The data involved consists of the names of the various cases. As an alternative, even if they are imported in to a board as “items”, I could live with being able to “promote” those items to Groups. Are either of these possible? My review of other posts suggests the first is not, and my trial error on the second suggests it is not, but either feature would be tremendously helpful.