A Quokka Dreeds its Weird

I sympathize with not wanting your voting system too complicated, though imo ranked choice still counts as simple. In my local elections you now get multiple votes that you can split and aggregate strategically and on two parallel tracks, where one is for the assembly percentage for the parties and one for people nominated by the parties on their lists or something, and you get a whole booklet explaining this before the election, but I'm not entirely sure I understand how this really works.