Quand il y a deux adjectif coller dans un groupe de l’adverbe. Lequel est le noyau?

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

3. why is it important for a firefighter to know another language?

J’ai eu une journée tellement chargée. je suis fatigué. je veux en lisant un roman.