What if I could go back in time

If I went back in time I would want to see all my family that died way before I got born. I would want to spend time with them before they passed away. I would want to warn people bad things would happen. I would want to see all the stuff that happened before humans were born. I would want to warn the people that died when the twin towers fell. I would take me back when I did all the bad stuff to my teacher and friends. I would want to travel back in time like a time traveller.