I loved this game as a kid and want to speedrun the game but I don't know what emulator to use and is there a discord for the game I could join so I could get some help with setting up the emulator and how to to run the game and possibly teach me some skills.

Use PPSSPP as specified by the rules.

The discord is linked above or use this link: https://discord.gg/uburntFvQU.