First things first. The top and bottom buttons are for the chrono. You don't need to do anything but leave them locked down. The "big" hand is NOT a seconds hand, it is the chrono hand and should be reset to 12. Unscrew the crown, pull it out just a little to the first click to set the date, pull it all the way out to set the time. Set the time and date, screw it back in and enjoy your watch. Don't over complicate it.
And your seconds hand is at the 9 o'clock subdial, you'll notice it moving. The other 2 subdials should be set to 12 and don't move unless the chrono is running.