The most critical thing I believe in starting off on any sort of wilderness adventure whether be in a vehicle or on foot, is preparation. Having the right gear, getting yourself in good physical condition. You wouldn't jump in a ocean and try to swim to the English Channel if you never swam before nor should somebody just plunge out into the desert especially the desert that can be a very hostile place without some preparation and physical conditioning so I recommend that you undergo some jogging, running, biking regimen ahead of time so that you feel that you are reasonably physically fit. You are prepared to deal with the very vigorous obstacles that you will be confronted with in a desert setting. Preparation is another phase of being prepared, knowing where you are going, taking the time to review your maps.