If it is possible for your timeline, consider taking the PPP course before your NSC and MPE4. If you have finished senior year in advanced math, had a gap year, maybe feel nervous, it is 225$ but it seems money well spent to do it before rather than after NSC.
https://ppp.tamu.edu/
The timeline won’t work for everyone, it is a shame this course isn’t started earlier IMO. I can’t find data for the fail rate for 2019, I think 2018 was over 40% of eng admits failed to get the 151 placement score at their NSC mpe4.