BITSAT

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!

Though all the universities are good in terms of academics but let me take LPU example being an alumni. The campus has students all over states and 40+ countries of the world. It has 145+ programs in 55+ disciplines,150+ tie-ups with foreign universities,30k+ students, and 1400+ global and Indian super brands for placement. There are multiple facilities within the campus like university Mall, university Hospital, Food courts or kiosks, Bank ATMs, residential facilities, food facilities, and Transport facilities. The elegance and the brightness of the campus even become more lively during events, concerts, coke studio performances, One India, and One World Fests. There are multiple student organizations that give an excellent opportunity to students to hone and sharpen their skills. The University also has a robust division of career services along with faculty and staff of parent-school to provide eligible students with job opportunities. Moreover, the security team works day and night ensuring the safety of the campus residents. LPU ranks amongst the Top 200 universities of the world as per the prestigious Times Higher Education Impact Rankings 2021, which assess universities against the United Nations Sustainable Development Goals (SDGs). In 2021 rankings, only three Indian universities have made to the list of Top 200 in the World. LPU has outshined various institutions like IITs, NITs, state and central universities across India and has ranked high on parameters of Affordable and Clean Energy, and Decent Work and Economic Growth. I believe this helps you in making a choice.