Too young for solids

Need some advice, my son is EBF. He recently turned 5 months and lately seems more ravenous than usual. I feel like I can’t satisfy him on breast milk alone, like he is still hungry after nursing and gets mad at my breasts. I’ve always said I will start introducing solids when he’s at least 6mo if not later. Do you think he could be ready? I am interested in blw and just feel like we’re in between a liquid only diet and starting solids. What are your thoughts? I’ll mention that he does not sit up unassisted yet but does show interest in food. I’m just hesitant to start anything new just yet.