How long does this whole process take?
How long a particular case will take to reach resolution really depends on the specific circumstances of the case and what is at issue. It would be very difficult to give an estimate without discussing the history of your case and the relief you are seeking.
Having said that, you should understand that if you pursue litigation and your case is not resolved ahead of time through some form of settlement, the process can be lengthy. It can take months or years to reach a final resolution of the matter, especially if appeals are pursued.