qatar divers are excellent and I would really recommend them. They are fiendly, inforative SAFE and they definately know their stuff. Julie who is one of their instructors is really very good, she took my in laws on a discover scuba trip and was extraordinarily patient and calming. We all had a great time. I know people that have done the open water course with them and I am a dive master and from what I see they are very professional - and best of all they love diving so inspire others too!
Diving in general here is not that great but as a place to learn, the water is safe, there are a few things to see and you will then be able to go to awesome places as a qualified diver and experience the big blue for real!
Best of luck on your diving journey - it is the best thing in the world! - quiet, peaceful, serene and slow motion - often the complete opposite to life in qatar and a very welcome bit of relief!
best wishes