You will just follow the winding wadi, which gradually ascends. At the very beginning it is almost flat, an easy-to-walk terrain with small gravel.
The boulders will become larger until you reach the XXL ones, so a bit of scrambling skills are required.
These stairways make your life easier so use them. It is obvious that they show you the most convenient way around huge boulders.
You will soon experience that the gorge becomes rougher and narrower.