Hello Umar,

As you also know that IITJEE requires knowledge of class 11th and 12th syllabus and B.Tech first year syllabus also has same applied science subjects. So you should keep revising the 11th and 12th class physics, chemistry and mathematics along with your B.Tech studies which will help you a slot in solving some of the JEE Questions. 

Hello Umar, you can start with making a perfect time table as per your schedule. Just keep in mind you have to give your complete self for 1 year to it. Study for minimum 6 hour daily of your JEE Syallabus. Divide your study time as per your strength and weakness for each subject. And never get demotivated, never let anyone tell you that you can not do it. Goodluck.