Timer starts at 0.91 as the rules say. If you're resetting on the first 3 guys, the timer will start at 3.91 due to loading times. Autosplitter is enabled already, so just start your game on R-00 and everything should work. If the Autosplitter isn't working, you might as well do this: Right click -> Edit Splits -> Activate

Everything should work for you then, happy running, bestie~