You feel its fear but I would like to suggest that have gutts and just take initiative. For once in a life time your heart beat will increase and legs will shake, voice will fumble but' but have to do it. Don't bother what people will say, just domit for yourself. And I tell you these are not just words I have done it on myself during my college time.
I tell you the story: There was a song competetion in my college and lot of student were participating. I also registered my name. After that there was an audition. Lot of my classmates sang well and when my turn came I thought I am not as good as my friend. So Idecided to quit. But sitting on chair I thought "Bakre ki maa kab tak kher maneyige". I concentrated my energy and waled on the stage for singing. I started and finished. During my singing I don't what happened but when I was coming back to my seat lot of students clapped and suggested few things like you were too fast, microphone was too near to my mouth, good effort, you have the guts to go on stage etc.. I knew I didn't sang good but took the positive feedback and my fear was gone. Its not me and you everybody fears stage. So a person who tries gets and appreciation.
Learnt from those feedback I started addressing small people of group in my job and then presentations etc..
I would like to suggest that just go and speak forget about everything