a good SW fish for a begginer belongs in a 30 gallon tank....
but if you have to do it in a 10 then i would suggest...
a yellow watchman
a pearly jawfish
a royal gramma
1-2 smaller damsels... eg. YTBD
or just an invert tank.. shrimp, crabs, snails etc...
all the fish fish are either or, do not combine them at all.you're looking at 1-2 fish at max
a 10 gallon is pretty hard to maintain if you don't have the basics down, packed.
i would really suggest getting a larger tank...