Trying to make my scifi as realistic as possible, and if there are any books that help you make more realistic scifi.
I feel like that'd be a bit over my head Looking for layman stuff, to be honest. Having accurate scifi without going into great detail .
Sci-Fi by definition is not realistic. If you mean making some of the background science seem realistic then you have to read a book on that because it can be so many things. What do you have in mind?
That's not true. Sci-Fi need be no more unrealistic than any other work of fiction. For example, Heinlein's classic The Moon is a Harsh Mistress was completely in accord with science as we know it. I think the more recent The Martian is as well, although I forget what solution they used to keep the crew from suffering radiation poisoning during the trip from Earth to Mars.