I'm trying to find more people that run this and could help give me advice so that I can male a good showing of this at a weekly speedrun night I go to, so I'm coming here to see if there's a discord for this game. If there is, then please hit me up :)

There is! but it's part of the general Sonic series speedrunning discord https://discord.gg/VqkNCEe just a note though, you'll only be able to talk in one chat for the time being, but people can and will definitely help you in that chatroom! Also if nothing else if you're trying to learn Sonic any% Chronoon made a guide for each level, check the guide section for that. Maybe one day us other runners will stop being lazy and make proper guides for the other categories on the board