Sounds like you are having some sort of problem, but we'd need more information to understand. What version of MuseScore, what OS, what specifically are you trying to do, what specifically goes wrong? If you are on macOS and finding a crash on startup, see #285057: MuseScore 3.0.4 on macOS is crashing on startup.
Comments
Sounds like you are having some sort of problem, but we'd need more information to understand. What version of MuseScore, what OS, what specifically are you trying to do, what specifically goes wrong? If you are on macOS and finding a crash on startup, see #285057: MuseScore 3.0.4 on macOS is crashing on startup.