Mummies , my baby is 1 years old and he already had almost full set of teeths which include his first and second molar . But how do i brush his teeth ? When do you introduce toothpaste ?

i use those finger tooth brush for now to proper brush his teeth with just water. I will also get a baby toothbrush (from piegon) for him to learn how to brush himself. Toothpaste will only come in when he knows how to spit at arnd 2,5yo