My brother is dexterous in playing trumpet is a brass instrument 
A trumpet seems like a difficult instrument to master.
wWLL IT INVOLVES CONSTANT PRACTICE,Trumpets are used in art music styles, for instance in orchestras, concert bands, and jazz ensembles.
I bet!  I really don't know a lot about the instrument or who may be famous for playing it.
They are played by blowing air through nearly-closed lips (called the player's embouchure), producing a "buzzing" sound 
Sounds difficult, what else?
There are many distinct types of trumpet, with the most common being pitched in transposing  with valves of the piston 
See, didn't know about types either.