हि indeed, बाल: a child, अकृतविद्यश्च is not learned in the science of warfare, बलाबलम् strengths and weaknesses, न वेत्ति does not know, अस्त्रबलसंयुक्त:च न has not acquired the strength of weapons, युद्धविशारद: च न not proficient in warfare, असौ he, रक्षसाम् of rakshasas, योग्य:न is not qualified, ते those rakshasas, ध्रुवम् certainly, कूटयुद्धा: हि are deceitful in battle.

Rama is still a child, he is not learned in the science of warfare,he does not know the strength and weakness of enemies. He has not acquired as yet the strength of using weapons and is not proficient in warfare. You know certainly those rakshasas are deceitful in battle. And hence he is not qualified to oppose them in the battle succesfully.