If not unflavored try simple one or two ingredient flavors,such as menthol, mint, blueberry, cherry, clove, licorice, or pumpkin spice (not pie). Avoid creams as they can have an unpleasant taste. Get the liquid made strong (2-3 extra shots) until you get used to tasting the flavors. PG carries flavor. So, get flavor with higher PG such as 65PG/35VG. Also, adjust the watts on your pv to get the best flavor possible. You will not get as much flavor blowing clouds as you will by using 6-12 watts with a 1.5 - 2.1 ohm coil. I get the best flavor with the Aspire general use replacement Non-Nautilus bvc 1.8 coils and have tried a lot of different brands.
Best wishes on your vaping journey.