Hi Karen, I would put down at least a couple of inches of black dirt before putting the sod down. Make sure and wet it well first, then sod, then water it again.
Here you go!
HI Karen, sandy loam first, followed by the sod. Drench the loam first before putting the sod on top. Here's a handy tutorial that will show you how - https://www.hunker.com/12609502/how-to-lay-sod-over-sand
Ask a master gardener in your area or check with your Botanic Garde