What would be your advise for a junior audit professionals to get a chance in Gulf countries? What to avoid?

Why not, In case you have any attractive opportunity go ahead.

Understand exact customs, regulations, traditions and ethics;

Understand language;

To do:

Understand local customs, regulations, traditions and ethics;

Understand local language;

Act locally;

Expand both professional and collegial networks.

To avoid:

Too much comments or against local traditions;

Implement something that is in contradicting with local traditions.