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If you are able, it would be a good idea to till some good composted organic matter, and dolomitic lime. This will act as a buffer for the soil, as well as add calcium and magnesium back to the soil. If it doesn't affect the other trees, which are a prunus species as well, then that will work to your advantage. You could go with a completely unrelated fruit species, and more than likely be fine.

As long as you have about two months until harvest then it should be OK. Usually ornamental peaches are not quite tasty. They are edible, but they will not taste anything like a peach that one would be used to finding at the store.

This article will help; https://www.gardeningknowhow.com/edible/fruits/peach/growing-flowering-peach-trees.htm