I laughed when I read your first post...
I recently had to rent a tracked excavator to find a water line. I was hoping to get the machine back under the 4-hour limit. Hauled it home and climbed on the trailer to find about 12 levers and two foot pedals. Zero explanation from the rental guy.
In 15 minutes I was off the trailer and on the dig site. The first hour wasn't too pretty to watch but I got my rhythm down fairly well and got the hole dug then got the machine back on the trailer and back to the rental shop in less than 4 hours. No damage! No injuries!
Move each lever a half an inch either way and see what it does!
I am thinking the lever with 1-N-2-N-3 is your forward range selection. Be fully stopped (engine running OK) before moving that lever.
HAVE FUN!!!