مرحبا
اهلا و سهلا
اسمي ترافس
انا من امريكا
شكرا
well done, i think you have done a good job. But remember something please, lots of people think "اهلا و سهلا " means "hello" but in real, it's incorrect. you could say : مرحبا or السلام عليكم. about " و سهلا" we don't do a space between و and سهلا; some conjunction connect with the word and looks as one word in Arabic, it's too different from the other language expect the hebrew which has the same.
مرحباً
أهلاً و سهلاً
إسمي ترافس
أنا من أمريكا
شكراً