u/ZephyrosTheAuthor2

For context, I'm writing a book where the main characters go on a flight to Proxima Centauri. I did some rough calculations, but have no idea how accurate they are for a few reasons. A; I suck at math. B; I've never done something like this before, or even remotely close.

I don't have the time dilation calculated yet, but was wondering if someone could help me with that? If so, that would be absolutely amazing. Here's what I have so far.