Although leaves are acidic, they do not add enough acidity to significantly affect the soil. In particular, some gardeners question the use of oak leaves in compost because of their acidity, but they can definitely be used. The acidity they possess is more beneficial than not, especially for acid-loving plants. This is also true for needles and wood chips from coniferous trees, which are acidic. Tying up soil nitrogen is a greater than acidifying the soil.
Timing is crucial.
Your pile is fully composted when it fails to heat up after being turned. Then it is ready to use. And use it with a good feeling, for it is your garden's natural fuel. Remember your objective, the foundation of every successful garden, is to achieve healthy soil. The soil must be regarded as a living organism.