Hey guys I'm really new to the speedrunner's world. I am also and software developer. I would love to get into speed running, but a lot of the games I love to run don't allow emulation. So I was thinking about creating a speedrunners emulator. first, start with NES, and hopefully make emulators that HAVE to run like the original software. What do you all think? good idea or am I out of my mind?

You should look into the existing emulators, because many accurate emulators for older consoles (third and fourth generation) exist. Take a look at BizHawk, for instance, which compiles a bunch of emulators for tasvideos.org. Newer consoles don't have this because modern hardware is not powerful enough to accurately emulate the hardware directly (to oversimplify). If you are serious and committed about helping, consider joining one of the teams working on newer emulators. I wouldn't recommend toiling for years by yourself. Alternatively, you could just try to convince leaderboard moderators to allow emulation (in separate categories where platforms aren't accurately emulated yet).