The whole key to living is deciding to put what you know into practice. Either you are going to muddle through life, or you are going to take control and live according to ideals that make sense. Make that decision right now. The whole point of wisdom is to apply it to make life better. Don't put off change for another day.
Talk is cheap.
Don't assume that just because you learned it, you'll use it. Making a decision to grow is based on free will, the essential power of a human being. Every concept in Torah is an instruction for living. Learn how to use it. If you undertake a deep commitment to change, it will positively impact the rest of your life.