BLW is actually the best thing to do. There is a page called Solid Starts, which tells you how to safely serve solids to them appropriately to their age x
Also it is best to start with savoury and not sweet things by the way.
They don’t need teeth at all x
Teeth are actually irrelevant when it comes to starting solids 😊 their gums are really strong. Solid Starts has an app with a database telling you how to safely prepare food based on baby’s age. Even from 6 months they can eat most things if prepared correctly. Just no honey until 12 months or cow’s milk as a drink (can be an ingredient) or things like whole nuts and some other choking hazards that can’t be safely modified.