Would it sound awkward if I say "repair" instead of "fix" in this context?

Native speaker’s answer
Rebecca
It would sound a little awkward, yes! That's because "repair" is more formal than "fix." "Fix" is commonly heard in everyday English, whereas "repair" is often in relation to technical things like machines, pipes, or technology, and usually in regards to a professional who "repairs" things. Ex: I don't know how to fix my shoe. Maybe I should take it to get repaired. Ex: You need to repair the wall before guests come over. = You need to fix the wall before guests come over. Ex: I don't know how to fix my painting!