The answer to your question in an image :-
View attachment 851645
I switched to long hose some 3 to 4 dive vacations back without taking any classes. I made it a point to watch dozens of videos like these and made it a point to practice the S-Drill in front of the TV at first as well as on every dive thereafter at least once at 6mtrs.
I still ended up doing stupid things at first like forgetting to put the backup reg in my mouth and holding my breath until my face turned blue - while practising a demo with my buddy. A 22” short hose should be fine.
Tip: You don’t have to be muscular to learn muscle memory ( A wise man once said…
)