Hello M, my name is Arisa.

ALSO POSSIBLE: Hello. My name is Arisa.

I am from Japan and I live in Tokyo.

My hobbies are to reading, playing games, and travel.

I amhave start again myed studying English studyagain so I can go toet an working holiday visa in England.

I want to live in London and I want to work there one day.

Please become my friend and I can help you with your Japanese!!

What else should I put in my introduction?

help me please![SUGGESTION: Delete this phrase. It is redundant.]

Hello! My name is Arisa.

My hobbies are to reading, playing games, and travelling.

I am start agaresuming my English studyies so I can go ton a working holiday visa into England.

Or:
"I am studying English so I can obtain a visa and go on a working holiday to England"

I want to live in London and I want to work there onand work in London some day.

You don't need to write "I want" twice in the same sentence.

What else should I put in my introduction?

hHelp me please!

Hello M, my name is Arisa.

A capital letter should only be used in the first word of the sentence, for I, and in proper nouns. My is none of these, so it should be capitalized as "my".

My hobbies are to read, play games, and travel.

At the end of a list, and should be used with the final item. For example, "I love eating, playing, and sleeping."

I am start againg my English studyies again so I can go toapply for a working holiday visa in England.

1 - The action of starting your studies is happening now, so use "starting" instead of "start"
2 - Studies is the correct plural form
3 - You don't go to a holiday visa, you apply for one.

What else should I put in my introduction?

You can add your likes, dislikes, favourite things to do, and more. You are introducing yourself!

hHelp me please!