Aged manure is great for your garden in the beginning and every year after that. It feeds the bacteria that make your soil healthy and that is what your plants need. You can add it to the soil that you have there, mix it in, along with possibly some lime (if your soil is too acidic) and then plant into it. And as your plants come up, you can mulch the area around each plant with a couple inches more and this helps to retain moisture, keep down weeds, and as it decays further, it adds more nutrients right where your plants need it.
The only time that manure can be hazardous is if it is fresh, but if it's aged as you say, it is perfectly safe. If it's been sitting in a field for a couple years, it doesn't need to be turned. Turning only speeds up the composting process but left alone it will still compost, just a lot more slowly. Composted and aged manure will not smell like manure nor will it look like manure. It should smell earthy and have a black crumbly texture. Hope this helps and good luck with your new garden.