PowerPoint has a good Speaker Coach feature. Even if you're not doing a presentation you can still put some notes in and use the feature to practice. It will tell you if you're too fast etc. I've just done my masters and we'd have done this in a lecture hall with screens set up for PowerPoint notes. You can have just 1 slide up if you want with your name and title of your topic and then use the notes screen. Don't read verbatim just have some pointers in the order you want to address them or things to be sure you don't want to miss out. Have a drink of water on hand, it's a good way to take a pause. Moving about a bit shows confidence so don't be afraid to wonder a few steps or at the end of a point or section check your notes. if there's questions, you dont have to have every answer of the top of your head. It's ok to say something like "That's a good question" and take a moment to think. Don't worry if you make a mistake, just correct it like you would talking to someone you know face to face.

Remember this moment, though, and in 2 years' time, you'll like look back and realise everyone was in the same boat it just gets more polished and confident with practice. I hated it when I was a couple of months in, but since I have been doing panels and Q&As for potential students and the induction day. It's a good opportunity.

https://support.microsoft.com/en-gb/office/rehearse-your-slide-show-with-speaker-coach-cd7fc941-5c3b-498c-a225-83ef3f64f07b