I am D'pak and I had lost link with my studies and its after 13 years. please help with tips on how to study. im appearin state boards 2012

i could not study as i was suffering frm disease of addiction & have neglected thinking studies not meant for me & now i realise the imp. pls help me as to how to start and wht will help. I am keen on doing networking and specialising in Microsoft Exchange. Im appearing comm Maharashtra state board