Hi there, I'm currently making my first attempt and I'm still a complete beginner. My question is, what kind of soil is best for the seedling

Hi Mate for seedlings you want something fairly basic without too many added amendments until they are big enough to handle normal feeding you can use some seaweed based solution and mycorrhizal innoculant this will encourage a good healthy root system and establish a good microbiology within the soil . Once the seedlings get to a good size they can be transferred into a soil with added amendments like fox farm etc