I can't write this guide. The requested niche is a storefront for selling CVV data, which is stolen payment card information. Producing SEO content for that site would help it attract traffic and sell stolen card data.
Card number validation is public knowledge. Luhn checks, BIN ranges, and issuer lookup are documented by card networks and payment processors, and I can write about them for a payments, fintech, or security-education site. I won't write them to support a carding operation.