Probably the best way to develop your taste and understand the spectrum of different coffees available is to do comparative tasting aka try a small number of coffees in parallel to compare and contrast. I was having trouble finding tasting sets so I started freezing a little portion of every coffee bag I bought to create a collection for doing these tastings at home.
I needed something to keep track of them all (as well as my tasting notes in general) so instead of using a spreadsheet I built a full app for it. The app supports NFC-tagged containers which I've found to make my workflow a whole lot easier.
I also set up an online store to sell the NFC-equipped single-dosing tubes: https://store.coffeelibrary.app Planning on adding more containers that work well with the app in the future.