Engineering Entrance Exam

No, you can not get admission in the same.

Yes, you can give JEE Mains exam again. You can attempt JEE Mains 3 times and Advance 2 times.

You can get into CCE-Chandigarh, JIIT-Noida, Shiv Nadar University, etc. with this score. Also, try in BIT, Patna and Deoghar extension.

You can get admission in JIIT-Noida, Shiv Nadar, Amity-Gurgaon, etc. You should try in Anna University, Chennai. AU takes admission on the basis of board marks.

You can definitely get admission in south Indian colleges in CSE, but outside the purview of Mains mark.

You didn't mention your category. Your chances are very bleak.

NIT-Raipur, Government Engineering College-Raipur, Government Engineering College Bilaspur, Government Engineering College-Bastar, BIT Durg, Shri Sankracharya Group of Institutions-Bhilai, Rungta Colleges of Engineering and Technology-Bhilai and OP Jindal University-Raipur are the top colleges in Chhattisgarh.

I advise you to go for a drop, attend coaching and reanalyze your progress. JEE Mains and Advance has tough competition. Also, side by side explore your interests, i.e. do some short courses related to your interested field. If you opt for CS in future do learn C programming along. People are moving away from engineering due to limited job, if you end up taking mediocre college you'll regret. A gap year will cost you but will tell whether you are made for engineering or not.
B.Sc. now-a-days is also good option, academically as well as in terms of opportunity.