Hi
Since you haven't mentioned which stream you are in, I'll answer for a general case. It is very much possible to complete class 12 syllabus if you give 8-9 hours to studies everyday. Make a timetable, give few hours daily to each core subject. Read up the english/any language you have book at night or when you are tired and don't feel like studying. Whatever you study now, make notes of it, so you can revise later.
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