I'm only guessing on these because there isnt much data on SDN from test takers with MCAT scores <500. With EK, I know that for pre-med folks scoring 70%+ meant you were in good shape. I guess maybe if you score somewhere in the 50-60% range youre probably okay? That's a total guess, I have no data to back that up.
NS (and almost all the other prep company FL's) are known for giving deflated scores, at least for people who scored like 508+ on the real thing. Assuming that's true for scores below 500, I'd guess that anything above like 490 is good for a pod school applicant. Totally guessing on all these though, so don't take them too seriously
Also note that your first exam is probably going to be lower a lot lower than what you may actually end up with later. My first MCAT experience was a half length NS diagnostic that I got a 495 on. A couple weeks later though I scored 504 on an NS FL