I follow my babies lead. Is he grabbing at food from your plate? Does he smack his lips at it or mimic you eating? When he shows signs like that I might offer him a finger food in a mesh feeder and see what he does with it. If it looks like he is eating it rather than playing with it mostly, I'd try to offer food at regular mealtimes, and go from there. Watch for allergens of course. I wouldn't start with baby cereal.
DD1 wasn't interested in food at all until around 10 months. She was EBF until then, and then only ate snack like foods like cucumber, some eggs, bread. DD2 on the other hand has been wanting food since before 6 months even, but has ate regularly since 6 months, and is now wanting to feed herself. She'll be 1 on the 28th.