if the autopilot is engaged, you can’t physically move the wheels, because it is moving them for you. Press the red button on the steering wheel to disconnect autopilot.
That IAS tape on the left of the sky/ground box is the most important thing on the plane. It’s got red bands on the high side and low side that you should stay out of.
if the plane tells you there’s a “stall, stall” you need to push the wheels forward to make the nose go down. And keep the speed above that lower red band.
the black button on the wheel is the push-to-talk to talk on the radio, or maybe the internal PA system. Depends how it’s set up.
most important: the switch for the “fasten seatbelt” sign is usually on the bottom of the top panel. You can flip it on and off as much as you want. (Older planes will also let you do this with the “no smoking” sign).
Some more practical tips.