Good job, Judy!  Just to be clear, when you say "he" or "this team," you will be pointing to people in a picture?

Here are my edits. I did not change much. I put a few notes in the speech in parentheses ( ) when I had questions.

Hello, seo2 students! I am the director and producer of Seo2 English Broadcasting Corporation, Jimin Lee. I am so pleased to be the producer of SBC. Our group will be presenting school news, sports, weather, quiz and also other things every Wednesday. First of all, let me introduce our SBC members. This is our coordinator, Cowboy. Next, this is my assistant and producer, 홍준원. Next I will introduce the announcers. He will make sure our team doesn't do something wrong (Who is he? What is his job?).  This team will be presenting Domestic (What is domestic?) and sports. Do you know what this group will be announcing? School news and information about the world! They will report interesting things about what is happening at our school. Next, this group will be presenting weather and art. Seo2 students can get information about the weather and special events at our school or worldwide. These two students are going to present the quiz! You can expect that the quiz is going to be fun! Finally, these are the engineers. These students will help us announce on TV. We will do the best we can do to announce interesting things. Please participate in our fun and awesome broadcast. This is the first time for us so, we could make some mistakes. When we make mistakes, we will gather our thoughts to solve the problems and try our best to fix them. Let's wish the announcers, reporters, producers and engineers good luck! Thank you for listening and have a wonderful and fantastic day!