well i guess it wont be an oem
fit and may look awkward along with it you would need to change the faceplate. Possibly the cable connector may not match the oem
connector(not sure) but if you can spend a bit more say 15k you would get a caska or motevo which is an oem
About the steering check with the dealer.
By the way why do you want to change the oem
head unit? unless you are adding in some subs and amps.
sorry snell well practice makes you perfect why not practice on a friends car or relatives till you get the verna. These driving school guys dont teach well. Be careful while taking your car out form showroom in traffic diesel cars are different from petrol cars which most driving schools teach on.