Oh yes I read 10 weeks anyway, prob cos of your title and ticker. 10months and starting with a dummy would not be good.
Defo easier to start early. I started at 3mo and it wasn't too bad but he did offer some resistance. One of my sisters started at 8 mo and it was more difficult but she cracked it. My other sister's baby is 1year this month and she is too scared to think about starting BW now they have so many bad habits!