CBSE 12th

Yes, it's a good idea for you to do a degree and pursue a Master's degree. As pursuing Master's degree helps you in getting placed at even more good companies with a reasonable package.

Yes, you can apply in this course but might not be able to get admission in top colleges because the cut-off list goes high.

Your percentile is not very good. So, your chances are very low.

According to your percentile, you may get admission in this college.

there is less chance to get this college.
good luck

Hello Ankit,
You may use the link below to know your chances of getting a college for software engineering with your JEE Main score :
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
You may also check out the following article :
https://www.shiksha.com/b-tech/ranking/top-computer-science-engineering-colleges-in-india/46-2-0-0-0

Yes, you can take admission in the desired college. Firstly, apply for admission in the college website and undergo through entrance test.

Hello Ankit,
Your score is not bad but it is difficult to get aeronautical engineering at Madras Institute of technology campus of Anna University since the competition is too high as well as there are many people with above 90 percent or so. Hence, you can try your luck at the time of admission or apply for other colleges.

If you are interested in accounts then do CA along with your B.Com.
If you are interested in management then pursue courses like marketing, HR or BBA.
For private jobs, doing B.Com or BBA cannot provide good positing. You also need an MBA or CA/B.Ed for that.

You have to separately apply for CET. If you want B.A. Hons seat form PU. Both criteria will be considered for getting admission in PU. For CET last date is already gone.