Translation of modify in Spanish

Hi,I'd like to ask you if it's possible for you to tell me briefly how to study here. I don't know that's why I'm not online most of the time. Thank you very much for choosing me as a friend. I hope our friendship can get better so we can practice.
We stayed in this place for quite a while as it was the most spectacular place we have visited so far. It was unbelievable how much thought was put into construction of these magnificent sites.
We had a great day in Bolivia and amazing 3 days in the entire area of Northern chile. It was time to move on and we wanted to go South to the capital of Chile. We were so exhausted from our day trip that we immediately fell asleep.