All life lessons are valuable, and failure more than most. I am sure there were some good times in there. The most important lessons i have learned so far is that you have to be true to yourself to be successful (that's a hard one), that you need to find what you value in life and pursue that (hint: it might not be money, and even though everyone is telling you differently, that's ok) and that ultimately, the only thing that matters is that you know who you are, what you believe, and at the end of the day you feel like yourself. I wish you great success, a little luck, and a lot of happiness ahead on this new journey of yours!