This is my third child and I breast fed my other two. This one is also seven years apart from my other children, so I feel like a new mom. Who would think I could forget everything so quickly

My son has started getting teeth. He already enjoyed the "let's bite down on mom's nipple and pull" game, so I don't look forward to him playing with his new teeth. He'll be six monthes in 10 days. Is it okay to start weening him to food? He shows an interest in eating for himself? Any suggestions, or hints would be greatly appreciated.