Which is a better option, enlisting for four years to first see if I like the military or just becoming an officer?

You might want to rethink "make life easier." Not sure how YOU define easier, but you could be in for a rude awaking. Generally speaking Military Officers often times have much more responsibilities than Enlisted Servicemembers. I definitely recommend and encourage you to join the U.S Military. Also, ("after High School") you will need a college degree as part of becoming a U.S. Military Officer, with the exception of maybe Warrant Officer Candidate School.

Whomever said being an officer was easier than being enlisted is misguided, there are more challenging aspects of each. However, you can still attend college then join as an enlisted member to see how you feel about the military in general. If you have a degree and Soldier well becoming an Officer is a path you can follow. Don’t let people tell you either path is easier or better. Each has it challenges, and each has its rewards. As a profession they are amazing if it is in Your blood, that you will not know until you try. To coin a phrase, Nothing worth anything in life is easy.

You could enlist and spent your four years and then apply to the USMA prep school or go to a college with a ROTC program. During your enlistment also work on your college degree.