You shouldn't be fertilizing yet at ALL.
I assume that is shultz fert. You'll want to look into cannabis-specific fertilizers when the time comes to use them (after 5 nodes have formed).
The yellow leaf tips are fert burn. Water heavily with plain tap water until some water runs out the bottom of the pot.
The round leaves turn yellow as the plant no longer needs them anyway, so don't worry about those.
Go sox.