What does 'Although no one can go back and make a brand new start anyone can start from now and make a brand new ending' mean?

As it is impossible to travel in time, you can not start over from where you are now.

However, recognising that where you are now is not where you want to be and not leading to where you want to go, it is possible to reevaluate what you want to do with your life and starting now, change direction.