I would try 50cm on 40% first week, 60% second week, 75%third week. That only applies if the plant is growing healthy tho, so you plant i like a week 2 plant.
I would also change the substrate to a lightmix option of any brand. Its the best way to start. Take the biggest pot you have and fill the pot like 90% and water your earth completly, like damping it 36h before you plant. Its good to flush soil before planting and also good for later roots. But for that a better draining substrate like lightmix is needed. Then u put dry soil on top, the place u wanna plant u water before too, and mix it muddy at the place u wanna plant then put your seed not more than 2-3mm deep in the earth. You wont need to water atleast 10days, then if you have atleast 10l of earth you can water 1l at a time and wait for the top soil to become completly dry. Next watering 1,5l, next watering 2l, till you reach the max and your pot leaks 10% of the water. You can in theory water frequently and dont have to wait for dry topsoil, but a overwatered plant is way worse than slightly underwatered. It wont kill your plant atleast.