Any tang (or other fish that get large) might be OK for a little while, but not for long. Consider returning it to the store and research fish that will thrive in a 10g. That tiny blue tang you are interested in is most likely a Blue Hippo Tang and get to over 12" long. What you see in the store's tanks are juvenile and sub-adult fish that are not finished growing. Rarely will you see an adult available at the store. And if they did, you'd need to be Donald Trump to afford it! :lmao:
The list isn't long, but there are some interesting fish; for the most part gobies - clown goby, Rainford's, Randall's shrimp goby; and smaller blennies.
Please, please do research on any species you are considering to see if it will do well in your set up. And try not to ignore what you see, they tank sizes that are given aren't arbitrary. Post fish you are interested in in the correct thread in the New to the Hobby forum and I would recommend Scott W. Michael's book Marine Fishes and The Conscientious Marine Aquarist by Fenner. Maybe your local store has copies you can browse through as they are fairly expensive.
Continue to ask questions here! This place is an invaluable resource. I know that my tank wouldn't be a success without it!