hi,

please be patient and dont loose hope. you  have many more ways to go. first of all complete the full syllabus of your board exam throughly, then started solving mcqs from jee mains. jee advance is a level hire than jee main and it might difficult for you if you right now started practices jee advance question. you may follow jee mains , tata mac graw books for pcm, once you do complete the jee mains papers then you may opted for jee advanced level questions. however always makes short notes for last minute revision, make a routine, study atleast 10 hrs a day.

if you can maintain it coming 1 year you may surely get success.