Cevap:
1. No matter how smart or successful you are, you will encounter difficulties in life. I think that such people overcome the difficulties in life by applying the techniques they have learned from the difficulties they have overcome before.
2. yes, because you can only achieve in this life by improving/ developing yourself.
3. absolutely yes. because making these mistakes again in the future can hurt you and peoples around you. To prevent this, it is necessary to learn from previous mistakes.
4. I can't give a specific answer to that. but in order to show and convince others of the work you do, you must first believe in yourself and be determined in this work.