The first time growing(Grandaddy purple auto)

Hi there yall. First time growing and super enthusiastic and so happy about it. This little girl just sprouted. As growing in Southeast Asia, the sun and the heat is real. Growing on the rooftop of 7 storied building so no worry abt not getting sun light and air flow. However, the heat is real, so i gotta yeild it with the shade cloth and water it carefully. The soil im using is mixed soil that contains rice husk ash and composts. I mix it with coco coir, perlite and worm castings. Layered clay balls abt 2 inches underneath and an inch at the top. Thinking of giving the nute only after 10days or 2 weeks. Just thats it for now. Hope my girl grows strong and thrives!!!