It is important that one has an idea of what to expect, thereby minimizing any potential let-downs and/or problems that might arise.
Your question should be designed to get you focused on the choice you have made, or will be making, to teach English in Saudi Arabia.
Do you need a TEFL or CELTA or Trinity TSOL certificate? Yes, No, Maybe...
This is just one of the questions that can be answered.
The possibilities are great. Ask your question so that you can move forward and reap some of the benefits involved in Teaching English as a Foreign Language in Saudi Arabia.