Thailand with a 7 month old

Was wondering if anyone could help and advise.

Looking to go to Thailand with my partner and our 7 month old in middle November. We are flying into Bangkok and that’s as far as we have got so far. Was thinking of flying to Phuket for 6 days and spending 4 in Bangkok as everything I’ve read says Bangkok might be too busy for a baby.

Can I get some help and advice please on places to stay that are family friendly. Also open to locations as to where to visit if there are better options then Phuket. We are going for 10 nights and would want hotels 3* and up nothing too fancy.

Thanks in advance