I Mmoved

I moved to a big city for work, and more than just be being in another place, I had the chance to change my way of life completly completely. I could start again and make the right desicions decisions to avoid to make making the sames mistakes again!
It is a new beggining beginning and I will do my best to work hard and become a better person.

I have made some corrections, well done on your work.

I Moved

I moved to a big city for work, and more than just be in another place, I had (or have? *) the chance to change my way of life completely, and more,  now I can start again and make right decisions and avoid to make the same mistakes!
It is a new beginning and I will do my best, to work hard and become a better person.

* I would write "I have the chance to change..." that means what you have to do now, in the present.

I moved to a big city for work, and more than just being in another place, I had the chance to change my way of living completly. I could start again and make right desicions to avoid making same mistakes! It is a new begining and I will do my best, work hard and become a better person.