hey damo...
Yes
it does get easier.... pretty fast actually.
the hardest part is paddling into a wave and the acceleration while standing. off the back you go...

I tell first timers this:
paddling into a wave on SUP is NOTHING like surfing
after you catch it and are still on your feet... it IS surfing.
What you may want to try...... as the wave approaches, is slide your back foot out of the parallel stance and into a "modified surf stance". That means, that you move your back foot 6" back and turn your toes toward the rail, till you are in a "semi surfing stance'.... this will give you the
front to back stability that you are used to, when dropping in on a surfboard. (don't go full surf stance.... you will lose your
side to side stability)
Day 1, I fell 100 times... my daughter was shrieking on the beach and peeing herself

I caught ONE wave on my knees and stood up.
Day 2, I caught 3 waves while standing
Day 3, I figured it out and within a week or so, I was very solid on my board. Never surfed a surfboard again.
Just a minor adjustment of how you catch a wave while standing... then it's all good.
Enjoy and report your progress