If you want to maintain the speedometer accuracy, you cannot use 195/65R15 (same ratio with a fatter tyre, so the tyre will be slightly taller)
https://tiresize.com/comparison/
Also, your tyre options will depend on the width of your rim. (try to stick closer to the ideal width)
https://www.tyresizecalculator.com/tyre-wheel-calculators/tyre-size-for-rim-size-width-calculator
Generally, 205/45R17 would be a good fit, but you will need to get a set of 17" X 7" rims.
Whatever tyre/rim you buy, make sure you have enough clearance. (brake caliper clearance / fender clearance / ground clearance / suspension clearance)
Bigger/thicker tyres will look cool and provide better grip, but they will be heavier so do expect a little bit of noise and slightly worse fuel mileage. Also, your top speed may be slightly lower with bigger tyres (unsprung weight).
Rims - One way to get rid of most of the cons in wheel/tyre upsizing would be to get a set of forged rims ($$$) as they will be lighter and stronger. (I assume you could get a set of 2nd hand Jap spec wheels for less than Rs. 70,000). Do make sure that you pick the right offset for your use-case. You can always push the rim towards outside by using a good quality wheel adapter. PS. Do not buy cheap cast rims, you may regret later.
Tyres - If you are changing tyres, look for some high grip tyres (Michelin PS4 maybe) as they would make a huge difference in combination with a set of forged rims.
Ideally, get some H&R lowered springs at the same time (or coilovers - do NOT buy unbranded shitty coilovers) and enjoy your car.
