hopefully you can read hiragana. I will try to use only hiragana here so it's easier to understand but, you can put into google translate and change it into kanji or to have the english reading.
じこしょうかい= self introduction
なまえはなんですか。=what is your name
きょうはどうせしたか。= how was today?
わたしのなまえは.......= my name is .....
わたしは.......から来ました。= I am from .....
げんきですか。=(literally) are you well? (contextually) how are you?
...さいです。I am .... yrs old.