Have a safe trip
There are many ways to enjoy your trip to High Altitude without risking your life.
If this is your first time at 2500 meters above sea level or higher, maybe a good starting point could be to read the free booklet published by MEDEX, a charitable organization for medical research expeditions to High Altitude.
The publication contains up-to-date and evidence based scientific information in a very simple language, on addition to general recommendations on how to approach safely High Altitude.
The booklet is available in several languages. The translation to greek was written ad-honorem by Dr. Sinifakoulis, also member of this organization.