hi,

see some of the institute provides extra notes and information,see the syllabus is similar to 12th course and some extra topics are included in neet .  I would suggest you to strictly follow the syllabus of neet  and ncert books. you may follow mtg publications books and previous years question paper for practicing  mcq questions.

you may use careers360 mbbs companion to boost up your performance,

https://www.careers360.com/mbbs-companion