Hey man you are off and running! Are these auto plants or photos? The nutes in your soil will last at least a month even with a larger plant so I would go real easy on feeding, personally I wouldn't give her anything for awhile but plain water. You are probably over-watering! Small plants don't need much water and remember that less is more, you won't hurt her by under-watering, but you'll know when she's thirsty. You should be giving very little water at this point. Also, make some more drain holes.. if you've been watering a lot, I guarantee there is water standing in the bottom of your container.. and that will "drown" the roots, stunt, and kill the plant. Hope this helps, you are doing well and remember that learning is something that never stops.. Good luck man!