Hey, I want to learn more about computers and coding/reading code, but I don't really know where to start. Any advice you could give me would be greatly appreciated! Also anyone into writing ciphers?

Coding knowledge is actually everywhere on the Internet. If you going to start, then I suggest u to decide which type of coding u wish to learn, or how are u going to apply the coding knowledge (create a game? create a webpage? control system?).

Without a specific learning purpose will make everything boring.
Once you decide what are you going to do, then you can start with a real computer language. Most common computer language including C++, HTML and Java. Just go Google or Youtube, there you can find a lot of resource