I been studying culinary, and I don't know what field I want to be in, I keep going back. At first I was study to be pastry then I went more sue chef area, now I'm back to pastry.

Any tips to focus on a field?

Englihs is my seocnd lanuage
A Sous Chef oversees employees and directs production in the kitchen, as the Executive chef's responsibilities may keep him chained to a desk most of the workday. It is imperative that you have excellent communication skills along with a good command of the local language if you are to be successfull.
I agree that if it is your desire to work as a Pastry Chef, and that is where your talent lies, then do it! Long term you will be happier.
Why not study both? Though, sue chef might be more flexible as far as getting a job is concerned, but the important thing is to do the one you enjoy more and are better at. Are you better at being a pastry chef or a sue chef?