How do we say "he is big for a baby" in francais?

Ineed in french. could someone check over a question in french? i am writing 'i am drinking water.' in french, can you check if it is correct? my french text: je suis le fait de boire l'eau

In this french correct ? i dont know if the person i am talking to is a female or male im assuming that wouldn't affect it but i kind of forget . i know all adjectives agree with the nouns that they modify. métier is masculine so i use the adjective bon and bon is masculine so i use un? is that how it works je pense un bon métier pour toi est un artiste ou un architecte. i think a good job for you is an artist or an architect

Me answer the questions in the 2nd photo on the blog in the 1st photo