Considering Joining Any Branch

Hi! I'm a 19 year old sophomore in college and I'm really struggling. I don't know what I want to do for the rest of my life and I just thought, that being an hour ago in my Texas History lecture, that I needed to take a break from school. But I know that I don't want to be sitting around doing nothing so I thought about joining a branch. I have no knowledge about anything military and I'm not enlisting for the school benefits, I don't even know what I'm doing in school right now. I just needed some advice on how all of you came to the conclusions you did about joining your branch and how that process went. This is kind of a spur of the moment decision, but I want to take this seriously and come to a thoughtful conclusion. Thank you for any and all feedback!