Those first two rounded leaves are stored food, not real foliage, and they set the tone for the following fortnight. Yellowing before the third node appears usually means the medium was too hot or the seed was weak, not that feeding is overdue. Beginner friendly varieties on https://budweedseeds.com are labelled as such for a reason, since vigorous lines push past early mistakes. Let the cotyledons fade naturally later on and do not pick them off.