Feeding solids

Hi mommies, my baby is going to turn 6month old soon. As of now, dia dah show interest nak makan and his neck pun dah quite sturdy. Cuma bab duduk unsupported that I am not so sure. Unsupported as in he can sit on his own for how long? 5min/10min? Or as in takkan terhuyung hayang bila duduk atas kerusi? Haha hope mommies out there can help to advise. #firsttimemom #newmom