I am a complete noob when it comes to ROM hacking, so I apologize if the question is a bit broad. I have a read a few guides on hexadecimal and I think I have a good understanding of hex and concepts like endianness, floating point, hex operations etc. I opened up a ROM(Pokemon Soul Silver) in a hex editor, but I'm completely lost after that. It's just a wall of numbers. Where do I even start changing things?