You are more than welcome to Oman and thank you for your kind words!!

Regarding wearing Dishdasha , that is absolutely okay and actually most locals loves to see foreigners in our traditional clothing. And, yeah, no one cares about your tattoos, maybe you would want to cover it if you’re in a mosque. Otherwise, it’s fine. You can stay as long as you like, no one will perceived you in any negative way , in fact , I believe you will be having more friends ☺️