Annyeong Haseyo is greetings like "Hello". If you would like to introduce your name, you'd better saying "Nae(my) I-reum eun(name) + your name + eem-mi-da(is)"

안녕하세요. You can learn the Korean alphabet in an hour or two. This should be your first step. I wouldn't recommend going any further with the Romanized Korean.