First notebook entry: Introducing myself

I'm Sachiko learning in English. 

I don't have opportunity to speak in English so much in Japan.
so, I'm looking for a person talk with me in English with Skype.
I teach you Japanese, of course. If you need.



Correction:
My name is Sachiko and i'm learning English.   
(it's always better to say "my name is..." when you are writing about yourself, if you're introducing yourself to someone face to face then "i'm xxxx" is fine. 
(these are 2 different subjects so you have to put "and" in between)

I don't have much opportunities to speak English in Japan, 
(this is just a recommendation for you to say this sentence in another way)
(opportunities is plural)

So I'm looking for someone to talk with me in English on Skype.
(it's better to miss out the comma in this case because you are explaining something, you don't need "," after "so")
(you say "someone" instead of "a person", because you trying to looking for a person that you don't know who it is. )
(it's better to say ON skype)

I can teach you Japanese if you want to.