My own correction needs correction! gomennasai! Here it is with the comma in the correct place!

Hi, my name is Shohko. I'm studying English because I'd like to talk to, and make friends with, many people around the world. Since I am a native Japanese speaker, if anyone learning the language wants any assistance, I'd be very happy to help.

Hi, my name is Shohko;) I'm studying English. The reason why I study English is that I would like to talk and make friends with many people and make friends with them (your sentence was not incorrect, but I have changed it so that it flows better). I am a native Japanese speaker, so if anyone who is studying Japanese , and needs some help, I am willing to help you would be happy to help. (Again, your sentence was not incorrect, but I have changed itto a more common expression)

This is how I would have written the statement:
Hi, my name is Shohko. I'm studying English because I'd like to talk to, and make friends with many, people around the world. Since I am a native Japanese speaker, if anyone learning the language wants any assistance, I'd be very happy to help.

First notebook entry: Introducing myself

Hi, my name is Shohko;) I'm studying English. The reason why I study English is I would like to talk with many people and make friends with them. I a am native Japanese speaker, so If anyone who is studying Japanese, and needs some help, I am willing to help you.

Just a couple of minor mistakes. That was a very well written statement. I would like to learn some Japanese, but I heard it is among the most difficult languages to master.