A mode 1 transmitter has the throttle on the right hand stick.
A mode 2 transmitter has the throttle on the left hand stick. Nearly everyone in the USA uses mode 2. All the new computer radios are able to switch between the two by making a selection from one of the menus. The throttle stick is usually ratcheted. If you switch to mode 1 you would have to get inside the transmitter to move the ratchet mechanism to the right stick.
Mode 2 would be your best choice...IMO
Airman Bob