JEE

No, there is no sports person quota in the IITs so you start preparing for JEE Advanced.

It will be quite difficult for you to pay the donation of this institute as the donation of this institute is very high and your family income is also quite low so I'll suggest you drop the idea of taking admission in this college.

See, if you have state domicile certificate then you may get the college in the second round of counselling but if you are of outside Maharashtra then it will be difficult for you to get into the college at this rank.

Don't drop a year. Either go for the improvement exam or take admission. It is only advisable to those to drop an year who have to improve there ranks. Moreover, Bangalore has some of the very good colleges. Try out your luck in the counselling process.

Army Institute of Hotel Management conducts its own written test for admission to Bachelor of Hotel Management. Candidates are selected based on performance in Personal Interview and Army Institute of Hotel Management and Catering Technology Written Admission Test. For further details regarding eligibility and admission criteria, please refer to the link provided below:
https://www.shiksha.com/hospitality-travel/hotel-hospitality-management/course/bachelor-of-hotel-management-army-institute-of-hotel-management-and-catering-technology-kothanur-Bangalore-73224

Please check for your eligibility to appear for the IISER entrance test from the criteria mentioned at the link provided below:
https://www.shiksha.com/science/exams/iiser-entrance-exam.

Yes, I have dropped a year and also took Jee Mains, Advanced and BITSAT. Feel free to ask anything.

You can't decide anything with your marks, you should know about your interest. And your interest should be your engineering branch although if you are pass with 50%+ then you can take admission in any branch of B.Tech but you have to approach private colleges so please choose wisely as per your interest.

Yes, you can directly opt for B.Tech in CS in any private college, some colleges are listed below, do check them:
MIT College of Engineering, Pune
Lovely Professional University, Phagwara
Marathwada Institute of Technology, Bulandshahr
VIIT College of Technology and Management, Bulandshahr
Brahmanand Group of Institutions, Bulandshahr
VIIT Polytechnic College, Bulandshahr.