Assalam o alaikum
Bro, 0 - 30 of Zic is a good enough option as per our climate. 0 - 20 is too thin for our climate .
Regarding Tyre size go for any 185-65 - 15 . it will give you better ground clearance and road grip without splashing mud on your side body areas. However, fuel economy will be a bit compromised.
175-65-15 is the genuine option but with that , you ll have to lift your car a bit from one level up flexible spring at the back to avoid car from touching the bumps.
My personal recommendation is 185 -65 - 15 though