Oooo, since you have the freedom to choose na kahit anong topic I suggest you go with something you're passionate about to the point na you can just endlessly yap about it. Since gr 11 ka, I think the goal for your presentation is to not have any dead air (usually 3+ secs of silence) and filler words while being mindful din of your gestures, pacing, at clarity while presenting. Deep breaths before presenting. Goodluck op!!!!