What should my next upgrade be? When does a wheelbase/pedal setup start feeling “realistic”?

I currently have a MOZA R5 Pro with the KS wheel and mainly race GT3 in iRacing.

I’ve only been back into sim racing for about a month after a 5-year break, so I’m still focused on getting faster and more consistent.

Would you upgrade the wheelbase or pedals first?
Also, at what point does sim gear start feeling genuinely realistic? Is 8–12 Nm enough, or is 15–20+ Nm a big difference?

Same question for pedals — what level starts feeling closer to a real race car?

Or should I just keep the R5 Pro and focus on seat time for now?