BITSAT Scores

You can read NCERT books from 11th and 12th textbooks to clear your concepts. Also, try to solve the Arihant Birla Institute of Technology and Science Admission Test books completely. To score well in the Birla Institute of Technology and Science Admission Test, you need to have good speed. Solve as many questions as you can to increase your speed. Aim to solve BITSAT's previous year's questions within a minute. Practice different strategies for solving problems. Take BITSAT mock tests. You can take more benefits by going through your class notes and memorizing formulae rather than buying many BITSAT-specific books. For more details, you may visit the Shiksha BITSAT exam page. (https://www.shiksha.com/engineering/bitsat-exam). I hope this will help you.

Start from basics, first of fall clear your basic concepts and work on the subject you have knowledge and make that concepts strong, if you want to clear the exam in least amount of time it's better to strong the concept you already have a little bit of knowledge, rather than hoping on new concept. And manage time also practice questions with timer !
Practice a lot of questions, Revise through questions, Do previous year question as much as you can this will help you to understand the level of exam and your weak and strong points. For Chemistry totally focus on ncert, complete it plus do pyq. For Maths and Physics first clear your basics through ncert, plus do a question booklet and ofcourse pyq. If you do these with consistency and sincerity you will make it !
You specifically don't need any coaching there are certain platform on which you can study completely free they will guide you ! Or you can take subscriptions to some online platforms but you will get every material and help on YouTube and on various platforms. I cleared JEE without coaching, it's all about your hardwark, consistency and patience !
Hoe this helps !
Thankyou!