After reading pages 132 and 133 from your textbooks, visit this website with more ideas about speaking in public. There, you will find information about how to deal with visual presentations projected with the help of a computer.
There are many places found in the Internet to host your presentation in order to be share with other people. One of the most famous ones is called Slideshare. Try to upload yours, using the exercise done in the mentioned pages and paste its url using the comments option of this entry in you wish.