only diapers to sleep and to go outside for now

I started my son at 18 months. he is 20 months and doing ok. by time I have the baby I know he will be almost fully trained. I take him to the potty every 15 minutes or so and no diapers all day.

there's no real concrete age to start. sometimes your baby will give you clues that he/she is ready, such as maybe starting to take off their pamper. my son was potty trained by 1 but my nephew who I babysit was 2 and a half.

Thank you @kiara23 do u have any suggestions. I have no clue what to try with my son and at that time my daughter will be due.

at 16 months