You want to one or two soils. If they are going into small cups to sprout then buy an Organic Potting Soil with perlite. (No fertilizers)
Depending on what they will live on later… Same thing Organic potting Soil with perlite and enrichments like worm castings and bat guano.
If you are going to grow in soiless mixes like coco or something then it would be better to start them in a similar soil mix.
Make sure pH pen pH up and down and calibration fluid are on your list!
ph up & Down
7.0 calibration fluid
I am in the US but I can tag over some of the AUS crowd for ya.
I need to make alist for tagging over, I forget who else. If you’re from AUS and want to help out your fellow growers a bit, stop by and let me know and i will add you to my list!