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