On this good occasion, it would be nice if I introduce you to a new payment processor for the self-hosted category "Payram" (I mean the brand in my signature space). I have not measured how reliable this service is (I have not used it yet), but it seems to fit your requirements.
By the way, they have active support and a dedicated thread on this forum that I think will help you get started or just get a more complete explanation.
Good luck.
https://bitcointalk.org/index.php?topic=5540530.0Thanks for the suggestion, I’ll check it out! For now, I’m about to try Bucksbus, they kinda convinced me. They promise no KYC, with on ramp and low fees. Hopefully, it lives up to the hype... on paper, it all looks good.