What’s the smoothest way for a customer to pay with Bitcoin?

I have a business where I only take bitcoin as payment. I currently use bitpay and refer my clients to MoonPay so that they can use their debit cards. Issue being that most are elderly so it’s very complicated for them.

Are there any smoother ways? Like a service which I can connect my bitcoin wallet to, and all my customers has to do is pay with debit and it gets automatically transferred to bitcoin? No need for QR codes, wallet keys, or such. Just simply your card information.

Thanks.