Welcome to the forum, Boris.
Others may have time to give a more detailed analysis than I, but I will say that your accent is much better than you appear to think. Your French accent is far less pronounced than that of most French people I have met who speak English.
You did mispronounce a few words, and you occasionally stressed the wrong syllable in a word, but your pronunciation is not "really wrong". I would not say that your version of English sounds particularly American; indeed, I suspect that some Americans might feel that it is rather British.