How much college you need depends on what you want to do for a living. Do you have something in mind what what you want to do as a job? If not, I think that college can be a great place to discover what you are passionate about. Most college degrees are a four-year program for your Bachelor's degree. In my job as an Instructional Designer, I found that I most benefited from continuing on to get a Master's Degree in my job field. That was mostly related to the level of detail that was covered in that program in regard to my field. My Master's program was actually about doing the work in the job that I do. I would add that it was important for me to go to college while I was working. It really helped me value my Master's experience. College is an expensive proposition. If you can work for a company that offers tuition reimbursement, that helps alleviate the money worries. It is, however, a lot more stressful to work and go to college. It is very much like having two jobs. I think that if you are passionate about what you want to do, college is not as stressful since you are doing something that you want to do and learn more about.
Good luck on your college search.