I have some cats experience. I can guide you a little. First you need to know that getting a pure breed is no use. They just cost you more money.
If you have any friend or relative who has cats etc , then contact him/her when she has kittens available. And as far as buying is concerned , I read somewhere that payment for a cat is haram. So since it is such a minor thing ( buying a cat ) , you can easily avoid it to be on safe side ( you aint gonna die without a cat )
And one more thing , female kittens require less medical attention , I think. I have a female cat and they also make less noise
Look for some ads or go to some vet ( dunger doctor / cat doctor / janwaron ka doctor ) and ask him if there is any cat/kittn available for adoption.
But if you still want to buy a pure breed , its upto you. These things cost atleast 10k. And it doesnt make any differrence just because its a purebreed. You know you can even sorta catch a neighbour hood cat if you want. Just make sure you are anti- rabbies vaccinated and rescue a feral cat ( that's wat they call it on most cat forums )
Gud luck...