My step towards creating a payment processing company

I had been thinking about starting my own payment processing company for a long time, and when I came across the article "How to Start a Payment Processing Company" on https://sdk.finance/blog/how-to-start-a-payment-processing-company/ , I realised that this was not just a dream, but something that could be achieved through very real steps. The article explains in detail what a payment company is, how it differs from a PSP or PayFac model, and how the payment system works: customer → merchant → processor → bank.
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I read about the key components: gateway, transaction processing, KYC/AML, infrastructure. The article also offers a choice: create technology from scratch or take a ready-made solution — and this interested me, because the option with a ready-made platform seems more logical than spending years on development. And with reference to this resource, I felt that I had a roadmap for action — today I am already working on a business plan and choosing a model.