You will make etiquette mistakes. Everyone does, including French people themselves. The key is your attitude. A sincere "Excusez-moi, je suis encore en train d'apprendre" (Excuse me, I'm still learning) accompanied by a genuine smile goes far. Most French people appreciate effort over perfection.
What's Changing: Attitudes Toward Foreigners
While the stereotype of French intolerance for language mistakes persists, reality is more nuanced. In major cities and tourist areas, patience with non-French speakers has increased significantly. Young French people, in particular, often speak excellent English and are happy to help—though attempting French first remains a sign of respect.