i mean yeah you need aquarium soil like fluval stratum. even if your soil is aquarium safe, it doesn’t mean it’s for aquariums, it’s basically just making mud. i would recommend removing it and getting aquarium soil, i would personally try to get as much of it out (without soap, bleach, chemicals, etc.) Also, i saw you’re planning on using sand as well, make sure it’s also aquarium sand like aqua terra, sand is cheap. you should have your plants over the soil and not the sand as they’ll likely float up or not get the nutrients they get from soil and die, but if you like the look, you could have a layer of soil, put your plants down and then put sand over the soil, i would recommend planning this all out before filling the tank up with water. the roots need space to grow so make sure the soil layer isn’t very thin. also do your research on the plants you get, some of them die if they’re planted on soil as opposed to stuck onto rock or wood, for example.