Yes why not. More than quantity, it's about the quality in national level competitive entrance examinations. Try to cover all the concepts after clearing your basics really well. Then solve as much as mcqs as you can since they'll help you know various types of questions asked and the exam pattern as well. This will boost your confidence too. Try to use some quality books for JEE ADVANCED studies like DC PANDEY and HC VERMA for physics, RD SHARMA for maths, If you have chemistry then use PRADEEP or ARIHANT.

Study hard every single day without wasting anytime and stay honest with yourself and your preparations.

Refer to the site below to get some tips for jee mains and JEE advanced and also their sample papers...

https://engineering.careers360.com/articles/jee-main-preparation-tips

https://engineering.careers360.com/articles/jee-advanced-2020

https://engineering.careers360.com/articles/jee-advanced-question-papers

https://engineering.careers360.com/articles/jee-main-question-papers

Best wishes Thank you.