"Realistic" engine tuning and resources for them

Hopefully a somewhat straightforward topic, I am looking to reevaluate my ethos for engine tuning by trying to avoid tunnel visioning directly on the flow utilization screen for cam profile, and intake and exhaust choice and sizing. I know for the latter, there is a tool tip that give an air flow value, but I don’t have enough experience to compare those values to an equivalent value to set the cam profile. So I was hoping to see if there was any resources to make engines that could be more comparable to real world equivalents, whether that be a text based one on the forum or a video format on YouTube.