It really doesn't matter.
It doesn't matter as there is no such thing as "standard buttons" on a side stick or control column. Take for example the A320 that has a priority take over button which sounds kind of useless to your scenario. Another example is the control column of 737(-800) that has 2 switches used for electrical trim. Such a switch doesn't exist in an A320 as the computers trim an Airbus A320. Finally, the most "standard" button (and perhaps the only one) on a control column is the communications button. But if one flies alone (ie not on a network with other players) to practice let's say a traffic pattern, that button is also useless -there is no one to transmit to.
Last but not least, the very important thing that other answers are missing to mention is that the rudder control is separately on pedals and not on a the "twist" control of a joystick1. That by itself can lead to some frustration when trying to line up the aircraft. Related anecdotal story: this week I was at Madrid World ATM Congress. There I had the chance to try an LPV approach driving an A320 on X-Plane2 (11 I think) with a VR headset with the exact same joystick that you have at the picture. At some point I looked momentarily down and I realized that I was inadvertently fiddling with the rudder (the pedals were moving a lot) more than I wanted to fiddle with -which was none at all. Apparently I was using the twist as I was trying to roll. Moral of the story is that there is more than meets the eye on a joystick than "getting the button setup right".
In my opinion3, a child aspiring to become a pilot needs to learn at least the notion of good airmanship. According to Skybrary,
Airmanship is the consistent use of good judgment and well-developed skills to accomplish flight objectives. This consistency is founded on a cornerstone of uncompromising flight discipline and is developed through systematic skill acquisition and proficiency. A high state of situational awareness completes the airmanship picture and is obtained through knowledge of one’s self, aircraft, environment, team and risk."
Confidence (not arrogance), situation awareness, orientation skills, stress management and sure why not some training on the simulator will help better. And the joystick comes last. Like any other hardware on a Personal Computer, one can set it up as it's more convenient to the individual.
A huge caveat on this last sentence though: no matter what, please don't inverse some fundamental actions as this might impose bad habits. To pull the nose up, joystick moves towards us, to dive it's away from us -obviously. Flight Gear must have it like that by default, but if that's not the case for any reason, change it promptly. I am mentioning this as I remember a user writing in a comment here in AVSE that some games lately have reversed the up and down keys. I can't find the comment unfortunately.
1 By all means I am not trying to convince you to buy yet another piece of hardware. Building a home cockpit can become a dangerous rabbit hole.
2 I am not affiliated by any means with X-Plane.
3 I'm neither a father nor a pilot so my opinion might not really matter.