Hi there & welcome to the wonderful world of posting!
Here's a couple of tips.
To get a sense of bergamot, buy some good Earl Grey tea. Bergamot is the main flavoring in that.
To help understand some other fragrance notes, go to a health food store. Many will have a sample display of essential oils. You can thus smell vetiver, clary sage, etc. in a concentrated form.
Keep on noting fragrance notes (many are listed in the BN entry for the scent) and make notes of the various fragrances you try.