You should attempt to understand yourself. This takes some time. People are unique individuals and only you can know yourself better than anyone else can know you or what you should do or how you should behave. In time you will discover ways to deal with stress, whether those ways are utilitarian or not.
You have lots of time and planning will get help you get ahead faster. One thing to remember is that the bottom line strategy to get out of a problem is to establish a routine and get appropriate sleep. Personally I abstain from sex (even looking at naked women online) as much as possible because it helps me deal with stress (I often fail in this regard though). There are times though that I don't worry about stress.
Once you become educated, there are less answers, because you need to take action and become autonomous. One of the most difficult things to deal with is freedom.