Are they autoflowering or photoperiod? Regardless of this, I would advise you to make a mix of 30% garden earth (because it is clayey and retains that little water in case one day you cannot water because you are not at home), 30% coconut fiber because it has a good drainage and a balanced ph, 30% of humus for plant nourishment, and 10% of perlite, vermiculite, mycorrhiza.
Before putting the soil in the pot, make a bottom of 2 or 3cm of expanded clay for drainage. After that, put the mix in the pot and let it rest for 2 or 3 days, before potting the seedling, once the seedling has been potted, water it a little, with water and very few nutrients dissolved in it (based on guano, about 1 ml per liter or even less) put it in the shade until it has disposed of the stress from the transplant for about 3 or 4 days, you will understand this when it has started creating leaves again, after which you can put it in a place that is lit enough but not too much to stress it. When the plant is big enough put a saucer and water it from the saucer and no longer from above, it will have a 10/15% higher yield. And this is all. Happy growing!