In order for you to buy any crypto there's a flowchart that you must follow: Choose exchange -> transfer money to exchange -> Buy Crypto -> Transfer crypto to cold wallet (optional step).
I wish I could've read this two years ago when I was just learning about crypto. I was fumbling for weeks wondering how to get the fiat to crypto process down.
Choosing the exchange can be tricky, though. And I understand the poster's frustration. It's not easy to trust a KYC check from a website or company that you've only known about for a few days. It took me a while to trust Coinbase with my photo ID, etc. I think before I got started with crypto, Paypal was the only company that asked me for a copy of my ID. And even then, I was still not sure if I'm being duped.