When should i start caring for my babys teeth and how do i go about doing it? At what age should i start using tooth brush and tooth paste?

i started the tooth brushing around 18months. I will start off with just toothbrush with no toothpaste to get them familiar with routine and how it is. Once he is able to learn out to spit (practice with water first) then i will start with toothpaste. I just use those normal toothpaste which can be found in supermarkets