Depends on how much work you want to do, but please research the difference between hot and cold compost, you may use either process for leaves, ideally you wil

Depends on how much work you want to do, but please research the difference between hot and cold compost, you may use either process for leaves, ideally you will want at least 1 meter cubed. For hot compost you will need a feedstock of nitrogen for the bacteria. Grass clippings, coffee grounds, liquid nitrogen (urine). This is bacteria dominant composting (hot composting is fast). On the other hand if you want to do less work just make them in a pile and allow for fungi to process the leaves over a longer period of time. This is fungi dominant composting (cold composting is slower). The soil life is already present on the leaves. Just keep the pile consistently moist but not soaking wet. I have hot composting videos documented on YouTune, although they are from before I upgraded my camera so the quality isn't as good as my newer videos, hopefully still informational.