Q.Soil for water lilies
I have watched Videos on planting water lilies, but I do not understand how to get the soil mixture to plant them in?

Certified GKH Gardening Expert
Water lilies need silt, loam, or clay soil. Talk to your local garden nursery to find special fertilizer pellets for them. If you don't have any heavy soil available, they should be able to help you with that, as well. Usually sod stores sell soil, too.
Here's a helpful article:
https://www.gardeningknowhow.com/ornamental/water-plants/water-lily/growing-water-lilies.htm