Baby led weaning

When did everyone start BLW? My son is 5.5 months and still refuses purées. He is absolutely interested in what we are eating though. He opens his mouth and grabs for our food/drink. Puréed baby food he gags on and will not open his mouth. I know most things say not to start BLW until 6 mo but he is SO interested in our food... so I’m just curious when everyone started?