Brother, you are always welcome. Look brother, there is range of polishes starting from 1000 and going up to 50000. Before you start, you should read the first post of this thread and all the links or posts mentioned there by Usman Bhai. Once you have a basic idea of detailing, then you can start off systematically.
I am not a pro detailer though but I can tell you few basics before some professional guides you. The basic thing is that you have to prepare the base well. The better the base, the better will be finishing. As you have mentioned that you have not detailed the car for long so you will initially have to use clay bar. Once done with that, thou will have to check what's the condition of swirls. And so on, the things will move.
I will advise that if you have an access to visit some pro, do visit and learn the basis. Thereafter, you can start your own experiments.
Happy detailing... 
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