Welcome!!
Glad your making the move!! I did at the end of last summer, and like you I've surfed for ever (not that I'm any good, but I still love it).
I did lessons at mullaloo and highly recommend lessons!!! Dudes I did it through we're great and really helpful.. Your instructor will be an endless surce of info in the early stages.
Learning curve? Steep as they come, however (at least in my experience) small victories each time you get out and soon enough your feeling like a king!!! Time on the water

surfing will help some, cauncy hit the mark because you should have a good idea how to judge the ocean and conditions as well as a healthy respect for the sea. Big plus!!
Glad your getting lessons mate :) I'm so thankful that I did! Time on the trainer kite will help a bundle too

Have fun and hope to see you up soon!!