There is an excellent National Geographic video series entitled: "Surviving West Point." It might be available on Netflix or Amazon Prime. Although a bit dated, it is a good presentation regarding the life of a plebe and it explores your question to a certain degree.
@kinnem has given you some great answers. The opinions expressed here all have a perspective that will likely be favorable towards the military as almost everyone here is either former military, current military or related to one or both. However only YOU can decide how hard you want to work to achieve your goal.
Heck, we don't even know WHAT your goal is, so it is difficult to answer your question with context. I
presume you wish to serve our country, and if so, I thank you for that. The Service Academies and ROTC scholarship programs are all designed to allow you to serve as an officer in exchange for a college degree.
It is very important to remember that serving can involve a lot of different activities including some that can and does result in the ultimate sacrifice.
So is it worth it? You should tell US the answer.