"Let's just helicopter out of the situation, shall we, people?" as some pretentious management consultants are wont to say.
You require two channels. One is controlled by a forwards/backwards movement of a stick (= throttle), and the other is controlled by a side-to-side movement of a stick (= steering). If you have a set with two dual-axis sticks then they can both be controlled from the same stick or they can be controlled from different sticks; it matters not one jot. I drew the diagrams
that way because many people use two-channel sets which have only single-axis sticks and are ALWAYS configured with the throttle on the left (unless you hold the Tx upside down..............).
OK? Easy, ain't it? If it was rocket science then you wouldn't find it in our catalogue
FLJ