Arid_zones_for_upload.png
The brown-yellow zones are semi-arid (steppes) while the red zone is supposed to be arid (desert).

I need help with the arid zones of my continent, as I want them to be as realistic as possible. The problem is I have only a rudimentary understanding of how far reaching the influence of oceans on climate are and what their impact on .I oriented myself mostly with the mountain ranges and distance to the coast. The climate can be assumed as earthlike, meaning the same rules apply. If it is relevant: The Lands north of the westernmost (left) mountains are perpetually frozen, then follow the same climate zones as on earth, the circumference of the planet is also approximately the same as earth's.

Is this set up believable/realistic?
Should the center mass of the continent also be red?
Howfar to the coast should the arid zones go?