Dear summit ,

If we calculate one year is 365 days and it is much more enough to start from basic level but it is also depends upon your concentration and abilities to catch up new things as faster possible .So dont be loose your hope and start your journey from positive interaction .

IIT entrance test is  top entrance test among all aspirants but lots of students prepare for IIT entrance test  from basic level ,so always time management is most important factor in those exam   like divide your syllabus by time and weekly and monthly basis .Every Sunday set up your mind and give mock test, where you will know the ability of yourself .If you are scoring low in particular subject the focus more in it and give some more extra time for that and download 4 to 5 years question papers and try to solve from easier to Harder level because it will motivate towards reading .

Now days lots of mock test are available in online ,some of mock test is paid or free you can appear that and if you are interested in coaching then you can start.

I hope it will helpful

Thanks