JEE

Yes, with 76 percentile in JEE Mains and belonging to OBC category, you are eligible to appear for JEE Advanced. However, to be eligible for JEE Advanced. You must also satisfy other eligibility criteria such as being among the top 2.5 Lacs candidates in JEE Mains and meeting other criteria related

Well, it totally depends on which center of coaching institute you want to go. So, If you want to choose between some coaching institute check their previous year performances and then take the decision. Also, there is too much of change of teacher due to competition so be careful about the faculty

Yes, you can appear for JEE Main and Advanced again after completing your 12th board exams. There is no limit on the number of attempts for JEE Main but for JEE Advanced you can attempt a maximum of two times in consecutive years. However, you must fulfill the eligibility criteria for the exams in o

First of all CONGRATS!
Considering you belongs to General category probably you can get PEC, SMVDU, SLIET, Guru Ghasidas Vishwavidyalaya, GKV etc. If you belong to some category then you have far better options. (I have recommended the colleges according to previous year cut-offs and results may vary

Well, if you are passionate about IITs, NITs, IITs and other known government. Colleges then you should dedicate a year to prepare for JEE rather than compromising your career.

Looking at BITSAT you will know that it is more about speed and accuracy But there are a few things you need to take care of. Yes I know BITSAT is an easy exam which is leveled below than JEE Mains.

BITSAT (Birla Institute of Technology and Science Admission Test) and JEE (Joint Entrance Examination) are both entrance exams for engineering programs in India, but they have some differences. Here are some key differences between the two exams:
Exam Conducting Body: BITSAT is conducted by the Birla

In JEE Advanced you need to be more accurate but in BITSAT your focus should be on speed. JEE Mains and BITSAT have almost same pattern. So we can say that JEE Mains prep is enough for BITSAT.

JEE Mains questions are now easier comparing to previous years questions (2014-2019). To solve them faster you need to have enough practice. All you need is to do practice more and more questions to become faster.

It depends on your state and category (you can use Shiksha's college predictor).