There is some engineering in music, but it is mostly on the EE side. Be aware this is a much smaller job field than ME in general. ME is the the most general field of engineering. You can work on anything from bridges to rockets with an ME background. The companies that recruit at a particular school can give you a good idea of what you might end up doing if you graduate from that institution.
If you want to design cars or airplanes, ME is an excellent choice. GM and Boeing hire mechanical engineers for that purpose. It is pretty difficult to be specific about the pros and cons of the job because the field is so broad. The details will depend upon the specific position, company, and your coworkers. You can probably expect a desk job involving the use of CAD software of some sort, and perhaps the use of MATLAB or something similar.
Without more information, it is not possible for me to tell whether you will find the material in ME hard or whether you are well-prepared. Your guidance counselors can assist you with this. Make them earn their pay. The best I can say is that ME relies upon a solid foundation of mathematical and physical reasoning, so your ability to understand these subjects at the university level will be related to your performance in ME classes.