Oracle Linux (up until 9.3 I think?) is a direct clone of RHEL. After 9.3 (or maybe it's 9.2) it's a best attempt clone of RHEL (similar to Alma Linux or Rocky Linux).
If you want to learn RHEL then it's a fairly decent equivalent with a couple of their own quirks thrown in (ULN, ksplice and the UEK).
Also, I don't bother with certs or care if people have them. I have yet to find someone who knows a product better having got the cert than someone who's used the product without a cert.
Exactly. If they are destined to get hit by a bus or not, it doesn't matter, God wills that they will or won't. So why bother looking when crossing the road?
I'm genuinely impressed people can get the damn things to generate working code. I periodically ask them to do something and every single time they will hallucinate.
Are you having a stroke? Is there someone I can call for you?