@godchimi A little late but I'm basically giving at least 6-7 presentations every semester as a part of my syllabus, and I'm an introvert. So yeah it's difficult thinking about all the what ifs and screw ups. Something that really helped me is realising that honestly, nobody cares. Other than the teacher, nobody is really even listening to you lol. And I know this because no matter how much I try, I zone out during other people giving the same presentations. So nobody is even listening. Just focussing on speaking clearly is your goal. Also, don't memorise your content, learn it as you would explain it to a friend. Much easier. The issue with memorising is if you forget even a single word, you'll fumble and lose confidence. If you explain it as if actually speaking, there's no need to memorise the content.
Hope this helps you and other people too!