Hello Deepdiver,
owesome progress towards your goal so far 
When you are interested in fellow unicyclists the OneWheelDragons may be rather close where you are living.
Also in Vienna the community seems to be currently quite active: Einradtreffen in Wien
Bigger wheels and shorter cranks, as already supposed, can make it more relaxed to catch up with your wife. Take your time to adapt to unicycle modifications.
Good luck for your ventures and greetings from Linz!
PS: Don’t miss Unicon 22 in Steyr 