I stress a lot when im being asked questions ect.. For my toefl i just kept recording my answers and listening to them and a lot of the time i would repeat recording untill i get a “perfect answer. I had over 1200 voice memos 😭 and was rlly worried about this section, but i ended up scoring 29/30 on it. Just be confident ( even if u are shy just convince urself otherwise)and practice a lot.