How to improve my presentation skill?

After, I did presentation about my self. I know how to improve my presentation skill. First, I must have a confident to talk in front audience. My voice is too slow and I stutter a few time. My eyes also much of the time looking at the floor I have little eye contact with the audience. Then , my personal stand statement too simple and plain. Therefore, I must add more information about my personal stand statement and some picture to support my personal statement. Other than that, I must prepare it before i want to present it. This is the best solution to make presentation success