Tipsy tips

HY! MY plant is 38 days old,im watering with tap water, im not adding nutes,temps are 29celsius at day and 20 at night,so.. 1. is this normal for leaves to be little curled like that?i may over water them...
2.this bottom first leaves are yellowing and curling to up is this normal too? i read somewhere its normal because lower leaves don't get much light anymore is that true?I recently put some Mg pill that is for humans but i read on forum its no harm so i melt it in water and give to plant xD
pic are somehow low i need buy new camera

if you examine the photos i dont think there is anything wrong with them at all. your box is lined in a highly reflective material and if you look closely, leaves that are low down or inside the pot edge are curled down, to catch max light from light source and walls, the leaves slightly higher up and leaves sticking over the edge of the pot are curled upwards to catch as much reflection from the floor to maximise both sides. looks healthy to me

often the initial opening leaves dont get enough light to be efficient so the plant stops feeding them

Hooked leaf tips is a sign of calcium deficiency. Is that coco?

ok thanks everybody, no its not coco