JEE

Yes, you can get admission in any engineering college except NITs, IIIT and GFTIs through JEE Mains regardless of your marks in boards. But for admission in NITs, IIIT and GFTIs, you must need to have 75% in 12th boards examination or be in top 20 percentile. For SC/ ST, the eligibility is to obtain a minimum of 65% marks in class 12 or equivalent.

The percentile is good but according to the recently released JEE brochure
*Candidates must have attained a minimum of 75% (65% for SC/ST candidates) of their respective boards. They can seek for private colleges.

For JEE Mains- Yes
Not for JEE Advanced.

No, not a good NIT, you may get lower branch in a new NIT ( depending upon the counselling) but still very less chance
You may get GFTIs CSE, just go through some previous year cut offs
As you are a sc candidate, you can get a good government college even at this rank
or
take a drop year and try again.

Yes, you can get B.E AI& ML at CBIT under the B-Category (Management quota 30%). You must have secured 50% in aggregate or in group subjects ( Maths, Physics & Chemistry) in the 10+2 qualifying exam.

Getting admission to a government college for engineering typically requires a competitive score in entrance exams like the Joint Entrance Examination (JEE) or state-level engineering entrance exams. These exams consider both the JEE score and the 12th-grade percentage. While AJEE score of 58.17% and a 12th-grade percentage of 52% may not be considered very high, it's essential to keep in mind that cutoff scores can vary significantly from year to year and among different colleges. Some government colleges have a higher cutoff, while others may have a lower cutoff.

Government engineering colleges are difficult to get on this rank. However chances can be made in JUIT Solan, Amity Noida, LPU Jalandhar etc.

Chances of getting admission in MBM Jodhpur are high. Please apply through REAP.
Fresh admissions in B.E. and B.Arch. programmes of the University are carried out through Rajasthan Engineering Admission Process (REAP) organized by Center for E-Governance, Government of Rajasthan, Jaipur