Good luck Calli! And good luck making it to a test center or having results that your chosen schools will accept, Shir!!
I enjoyed Project Hail Mary but felt like the book was better for most of the space/science bits. Either it was more believable when not seeing it, or it was more spelled out and less hand-wavey (even if scientifically I’m sure it made no sense). But it was already really long so I guess they didn’t have time to spell more of it out!