try him when you feel hes ready hun. if ur happy to try him in 5 days then just pick up a couple of jars n try him with ones that looks like it has less lumps, i cant mem what logan tried first think i just got one out of the cupboard and gave it him, at first he wasnt keen n gagged a little on it, so i went slowly and by him n i found he was sucking it then spitting the lumps out , so i gave him little snack after just to make sure he was full n not still hungry then i tried again next day n he gagged on first spoonful then by the 2nd was fine n ended up eating quarter of the jar, n within a week was eating half a jar easily.
not saying all babies will take to it quickly some may take to it quicker some longer, n some just arnt ready, sorry to ramble, guess what im trying to say is try him see how he goes he will let u no.
god think i need to go bed. xx good luck xx