Did you used these exchanges personally? Is this same as localbitcoin or I need to pay by credit or debit cards here?
Why the price always high at Indian exchange as an India how can I buy for the international market rate,Any tips?
Yes, i have used them personally, You can deposit fiat using Unified Payment Interface (UPI) using Google Pay, Bhim or PhonePe etc.
To purchase at international rates, you need to trade on international exchanges. Example Binance.