Payment gateway issue

I am facing trouble while doing setup of payment gateway, Razorpay. Kindly help if anyone knows

Razorpay setup issues on Shopify, ensure your API credentials are correct, check that Razorpay is supported in your region, and follow their setup guide. If problems persist, contact Razorpay or Shopify support for assistance.

Yes

Can you explain in clear like each and every step it would be great help