1. You are intelligent. (you finished your degree, considered several options, you are not making a brash decision, and you are seeking advice. All very positive and responsible things to do.)
2. You are looking for fulfillment in your education/work. (Find an occupation that supports you, your loved ones, and then find fulfillment outside of the 8-5.)
3. Your entire post is generally self seeking. (Find fulfillment in spending time with others, get in shape/fit, find someone that could use your help and enjoy their friendship, volunteer your time/expertise to a worthy cause, pick up a hobby that you always wanted to do. But the most important thing is to find others to enjoy your free time with.)
Edit/Comment: I agree with others, drugs/alcohol should be completely avoided.