Hi

Yes ,you can definitely crack JEE advanced examination without any coaching and get into top IITs for CSE branch.

There are a numerous of examples ,where students have cracked JEE advanced and have got a good rank without any coaching.

For example, in 2011, Ankit Jalin qualified IIT JEE  without any coaching and not only qualified but got an all India rank of 45.

You can do the same only to the same, just be honest dedicated and focused towards your studies for IIT JEE preparation.

Go well through the syllabus, follow a routine ,after completing each  chapter ,go for solving numericals and once you are done with your complete syllabus solve mock test paper and previous year question papers of JEE

Thank you