un texte sur ma réussite au collége et quelle branche je choisirai en utilisant may et may not

If I pass my exams and get to O Level,; I may chose a scientific section because I'm good at maths and physics. But I may not stay in the same town because the school I attend now is too far from home.So I may go and live at my grand parents' place. However; it may be difficuly to be far from my school friends and I may not move. 
The decision will be my parents' one.