Profession change Please help me Mr. Imran

Asslam walikum Brother Imran,

it is very urgent
Please help me as just I have arrived to Saudi Arabia with House Driver Visa.
Can I change my profession to marketing specialist as I am holding a degree attest from india
now I got the job in a good company in Jeddah.
There was some period to change the any profession is that period is still there or not I need your suggestion on it how I can go ahead.
Also suggest me which profession is good to call my family and parents or in laws.
Thanks & Regards,
Mohammed.