Bonjour Charléne!
Great entry, only minor edits to be made. Hope this helps:
I'm [1] Charlene, I'm French, but (and) i (have been) living in Montreal for 4 years. I have to practice my English for my future job. I would like to find a person who wants to practice language with me. I can help you for practice your French and you help me for practice my English.
[1] If you want to avoid repitition, you could start with 'my name is' instead of 'I'm'. No biggie, just like 'je m'appelle' instead of 'je suis'.
[2] English language doesn't include accent marks. So 'e' instead of 'é's :)
Would be happy to practice English with you if you're keen!
Presentation [Introduction]
I'm Charlene, I'm French but I have been living in Montreal for 4 years. I have to practice my English for my future job. I would like to find a person who wants to practice language with me. I can help you for practice your French and you can help me for practice my English.
Welcome to Italki Charlene!
Présentation
(Hello, I'm Charlène) I'm Charlène,. I'm French but I have been living in Montréal for the last 4 years. I have to practice my English for my future job. I would like to find a person who wants to practice the language with me. I can help you for practice your French, if you help me for practice my English.