Need na ba i-instill ang disiplina sa 1-2 years old toddler?

I have a 1 year and 8 months old toddler which at his age expected talaga na makulit at malikot. Is this the right time to instill discipline? Kasi oftentimes kapag sinisita ko hindi nakikinig at sumusunod. At sabi sa akin ng mother-in-law ko napakabata pa daw para disiplinahin ang bata. For me kasi as early as possible dapat dinidisiplina na talaga. Need your advice mga fellow monshies. Thank you.