Then you need to work up. If you are in 12th as you say then they will try their best to teach it in an year. SO The speed will be fast ofcourse.
You need to be focussed throught and do it.
See make a strategy, strike a balancr between old and new syllabus. Till jan try covering maximum of 11th because from jan through boards a lot of 12th part basICS would be revised.
Dont worry and start working from now on. Focus on concepte and basICS a lot.