It is very pleasant to hear that you have such high ambitions at such a tender age
you need to crack NEET UG with a good rank and get into a collage of your choice or DAVV UG entrance for that matter if you want to be a mail which you will be able to fill up after a given your class 10 and 12 board examination scoring a minimum aggregate of 50% in physics chemistry and biology for Neet and 60% image for AIIMS which will make you eligible for appearing for the examinations,after which you will need to pass the different semisters and university exams of your MBBS curriculum to get the degree
Following this you will need to appear for the Neet PG examination at the AIIMS PG entrance examination and crack it, to pursue MS in general surgery which is a 3 year course and after completing it with the requisite thesis and giving the examination which you will have to clear at the end of the three years you will be eligible to set for the Neet SS examination to super specialise in CTVS to pursue cardiovascular surgery.
Mercedes me one thing clear in your mind that you will only be able to perform vascular plastic operations and mainly coronary artery bypass grafting along with a few rules in amputation surgery is mainly as a cardiovascular surgeon in today's world and their important well known procedures like angioplasty, standing, angiography pacemaker replacement are all done by DM cardio medicine Doctors versus super specialised after post graduating in MD general medicine
so kindly jhajjar attitudes and be clear about what your evening at before you take a decision
would be glad to help you with further situations when you have passed your class 10 board examinations which will help you with intensive preparations and for now you can just follow NCERT based books like women in biology, op Agarwal and chemistry and SL Arora and physics to strengthen your concepts
also getting admission into an institution like Aakash or Allen which will give me a properly sincere all years is another viable alternative which you have unless you prefer self study in the form of making notes and solving MCQ papers on a time bound basis
All the best..hope it helps

the minimum marks needed to qualify for the Neet examination goes to as low as 320 out of 720 but in order to get into a decent government medical college availing 85% state quota in most States you need to score in excess of 500 and to avail the government medical college seats of premier medical colleges across any state in which even if you do not have domicile you will need to score in excess of 550 out of 720 two secure seats via the 15% all India quota

Hello Shruthi,
If you belong to unreserved category then sure that
As per the NEET 2019 eligibility criteria, a candidate is required to complete 17 years of age either at the time of admission or else on or before December 31, 2019.The candidates belonging to unreserved category must not be more than 25 years of age to fulfil the NEET eligibility criteria 2019.
There is total 9 attempt available for unreserved category.
And for more detail click the link and read full article about eligibility
https://www.google.com/amp/s/medicine.careers360.com/articles/neet-eligibility-criteria/amp
Thank you.

There is no comprehensive list of seat availability for PG courses available as of now.

But according to reliable sources, the total number of seats in MS/MD is around 25000.