Baby first solid food

Hi mummies, need an opinion. At which month do u give your baby their first solid food and what kind of food? Please advise. As my baby turning 5months soon and i do aware that babies cant take any solid food and plain water below 6months. But i see that certain parents will give it when thier baby turn 4/5month. And my SIL asking me to start giving cereal, blend the carrot n etc to my baby. She keep saying that my baby had already started to be hungry and want to eat beside drinking milk. Pleasw advise mommies! Thanks alot ❤