Indira Gandhi Rashtriya Uran Akademi

IGRUA is the best, they are government aided and have the best infrastructure, instructors, aircrafts and other facilities. They also have a tie-up with CAE, hence the quality of training and exposure is much better. Chimes is also doing good when it comes to private institutions. They operate from an uncontrolled airfield and usually have to go to Bhopal or some other controlled airfield to practise instrument flying procedures. The instructors are although good and same is the condition of their airplanes. Both the institutions have good in-house accommodation facilities available and the infrastructure is also comparable. My personal choice will be IGRUA.

Absolutely, there is a minimal issue. There is a requirement that if you need glasses, then you must carry 2 pairs with you at all times.
Here is an extract from the CASA Designated Aviation Medical Examiner's Handbook.
Professional Flight Crew and ATCs
For all professional flight crew and ATC: 6/9, corrected if necessary, in each eye separately. Additionally, the acuity must be 6/6 or better when tested with both eyes open.
Applicants with high refractive corrections (i.e. greater than +/-5 dioptres) should be advised of the possible complications, which may affect their vision, and of the implications for their aviation careers, particularly their increased statistical chance of retinal detachment.

Becoming a commercial pilot can be considered difficult, but just as difficult as many things we achieve in life. Once you become a commercial pilot, to keep being one, you need the same level of dedication and effort you put when becoming one.
It requires dedication, studies, and some personal sacrifices. You need to keep current all the time, so you have to keep studying throughout your entire career.
You will have simulator examinations every six months and every time you fly a new aircraft type. You also have to pass a medical examination every year.
Since I'm sure being good at any profession requires similar effort and dedication, I would say that it is not very different from any a career path you decide to choose.