Douglas Lemmo, P.E.
This is a difficult question to answer. Compared to what? All of the engineering majors in college are way harder than what you would encounter in high school. But, and this is a big BUT, if you like mechanical engineering and the subjects that you take in college and do the reading required and the homework, it can be very rewarding and even fun. You will be learning about how things are designed and built and will get a chance to interact with fellow classmates and instructors in laboratories and on various projects that will give you practical experience that will illustrate things that you will learn in class.
There are many branches of mechanical engineering, I would suggest that you Google Mechanical Engineering and read about the various branches to see if one area may be more appealing to you and all of the different things mechanical engineers do.
Drew Peake, MSME, M.Eng., MBA, PE, FNAFE, DEE, CIH, CSP
Drew recommends the following next steps: