You’ll do fine. Make reminders about the key topics and conclusions, if you get nervous then take your time, breathe, and stay focused on your current topic.
You wouldn’t be asked to speak if people didn’t already have confidence in your ability to say something meaningful or important, don’t worry about the questions. If you can’t answer a question, just say “yes” or “no” and move onto the next question.
The main thing is to take your time and breathe, before moving onto your next point, or answering a more difficult question.
Adding a joke or two, if you feel comfortable with that, is also great to do upon your introduction or opening. If people are laughing and you’re smiling, then you’ll feel a lot more comfortable, relaxed, and confident.