Stranger Things - Wait For Engine To Start

Thought I’d try out an activity or two. Turns out MSFS doesn’t want me to. Started the Stranger Things introductory mission, training.

Instruction 1: Press Ctrl + E to start engine. TICK. Instruction turned green and disappeared, so I know I did it right.
Instruction 2: Wait for Engine to start. Instructions unclear. Been waiting for 15 minutes now.