Cath,
I am going to give this a shot, but conditions sound far different than the central United States. Leaf mold is fungal dominated
compost so I would try to reinforce those conditions.
Congratulations on trying something different than burning leaves that could otherwise be put to good use. I would rake and put into piles held together by
chicken wire about 3 feet tall by 3 feet in diameter. I would place them in an area that gets good
shelter from sunlight and let them sit for 2-3 years (this may be faster for you if it does not dry out). For you I would say make sure they don’t get parched dry in your dry season. Usually leaf mold does not really care about heavy rains, but maybe some protection from drenching downpours would help prevent nutrients from washing away. Maybe turn occasionally and spread moisture for an even consistency. But I would want to protect from excessive dryness. Chopping up leaves probably won’t hurt but I would concentrate on keeping the leaves from drying out.
One other note. This will take some time. In the past I have found that the ground under any compost heap is magnificent after the pile is gone. Maybe consider placing the pile somewhere where you will use the ground afterwards. This could be on a future
garden bed or maybe under a tree.
Good luck and let us know how things work out.
Eric