Let me just agree with what Mutt said; don't come to SV with your eyes closed and then complain (please!).
If you enter as an F/O you'll be bottom of the F/O seniority list, below even the 20 year old cadets. There are currently 700 Saudi's ready for upgrade. They currently upgrade at a rate of about 60 per year. If you enter the company as an F/O then that is what you are; potentially permanently.
Regarding hours on an aircraft; SV Pilots are required to DH between major Saudi Airports generally in Economy, normally around 20 hours per month. This means hours spent on board an aircraft is, more often than not, over 100.
Don't forget that this is not a commuting contract, you will live in Jeddah. Good for saving money but there really is no life. Movie Theaters not allowed for example.