As a young person, I want to advocate that every young person seek to learn as much about financial affairs as is possible. It would not be unwise to take a simple bookkeeping course. Learn about the stock market, have fun but not at the expense of your financial health.
It would be a good idea to establish a monthly budget of expenses if you have never had one before. I love music and I have a budget for buying my iTunes monthly of the artists that I like and any new ones that I find in my hunt for new rap songs.