Does anyone know how much is it going to last till Qatar, EK and the other Middle Eastern companies start the recruitment again? Like which month approximately?

No one knows at this stage... until airspace opens up fully (with many countries not even allowing flights in/out) and the airlines can reassess their situation. Many cabin crew have lost jobs due to this crisis so recruitment will be minimal/non existent for the coming months. The airlines have been hit hard and will all be struggling financially and less willing to take on new crew. Once airlines start to operate again it will be a gradual process before there will be any normality, then they will decide what strategy to take and then recruit but it will take a lot of time... I don't expect to see any serious recruitment for the next 6 months, if not longer.