Don't order any topsoil until you go check it out. Pick some up and spit into your fingers and rub the soil, if it sticks, like clay, don't buy it, if it feels sandy, depending on how much, not like a beach, decide then. The best thing is to start your own compost pile, grass clippings, kitchen scraps, coffee grinds, etc. or purchase some composted cow manure and mix that into the soil if you want to get started right away. Some manure has a lot of filler so just buy a couple of bags at first. Different stores sell different manufacturer's and they are not all the same. They do have mushroom compost that smells and is expensive. You don't have to rush you can add compost year after year.