How do you know a food item is masculine or feminine in french

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

Select the correct sentence to describe your grandfather. be careful with the adjective agreement. il est polis. il est jolie. il est timide. il est supers.

How do you say in french: first, we visited the château. / nous avons visité le château.