I also buy certain sheets but this one I want to try out playing first. Maybe it is too difficult, I don't know.
them write to the publisher and ask for a 1 or 2 page sample , many make this available for that reason. Or , check it out from your library for a fiew days,if library does not have it in collection, talk to circulation services and ask for interlibrary loan.
Or find a retailer with a flexible or generous returns and exhanges policy and buy it, if too hard and you dont want to keep it (which is best option so you have it when you are ready), you can exhange for store credit and use ro biy somethung else, there is literallt option after option available to you...