problems in presintion

Nowaday a lot of as have problem in making presintion.my problem is that I get litil bet nerves wale I'm standing affront of all people and what makes me nerves is that i don't know a lot of word in English. Second thing is in my life I didn't make presintion so it's litil bet hard to me to talk darktle, and some time I forget what I'm going to talk about.my first presintion was last year when was in the foundation it's was in arbec languish so I didn't make mistake and the second one it was in this year I filt nerves because I didn't know the mining of word in English that I want to use but I did my bast in it so I hope you knowed about me a lot and you can help me improve in presintion.