IIT

Pedagogy at IITs and conventional engineering colleges differs quite a lot. Conventional Engineering colleges teachers do not have flexibility to modify syllabus and use modern teaching technologies. They focus on covering syllabus and more on remembrance of facts and examinations are subjective. Whereas teaching at IITs is focused on developing sound theoretical base and its application using logical and creative thinking by students. IIT facility has lot of freedom in setting course curriculum and grading. IITs have best of facilities with sharper student population. IITs thrive on intellectual discussions among students and students and teacher. Overall development and learning opportunities are far more in comparison to conventional engineering college.

Hello Nikhil,
The possibility is high to get an IIT if you drop a year and study, but you need to really work hard and you must be passionate towards your goal. The time of one year is really huge and so it should be used wisely, otherwise, it is better to get admission in any engineering college with your board exam marks.
If you are determined to study and dedicated towards your studying then you can get, but according to me, only if you can really work hard then you drop a year. Otherwise, don't waste your time.
The continuity of study is really important so that it is better to go to an engineering college now itself, but if you can, then drop a year.
Your confidence is the one which determines your admission into an IIT.
I would advise you to join a good IIT coaching centre as they will guide you properly. It is your wish only to drop a year., but if your board exam score is good, you can take admission in a good engineering college also. As many who have dropped a year also failed to clear JEE Advanced.
All the best.