ICSE... then only log into IRI on the evening when you will come back home after giving your last ICSE Exam... you may get some respite from studies but within a few days you will need to focus on your Higher Secondary ISC Education (10+2)... so again IRI in moderate doses... IRI is not running away but time for your studies will never come back... I am saying this as an Ex-ICSE/ISC Student so all the best for your exams and take care of yourself, health and family.... Manav :-)
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PS: If...
more... you are strong in Maths then ISC Science is for you and you can go towards the Direction of Engineering... IR is waiting for talented Railway Engineers.... or else other professions like TTE in IR are there for you to pursue ;-)