Hello!, Hello,

Saying "Hello! Nice to meet you." as two different sentences is fine, but not very smooth. If you combined these two sentences together into "Hello, nice to meet you!", it would sound much better.

I'm Satomi., I'm Satomi,

Same here as the first sentence. Try "Im Satomi, and i'm from Hokkaido". Having them as different sentences is ok, but combining them makes them feel smoother.

I'm studying law, but I want to be a TV director. I'm studying law, but I want to be a TV director.

I'm studying law, but I want to be a TV director. I'm studying law, but I want to be a TV director.

When I was a high school student, I joinedwas in the cheer-leading club and science club. When I was a high school student, I was in the cheer-leading club and science club.

It's true that you joined the clubs, but the act of joining isn't really what you mean to say here. The sentence is more about being a member of these clubs.

When I was a high school student, I joined the cheer-leading club and the science club. When I was a high school student, I joined the cheerleading club and the science club.

I have joined a law study circle. I have joined a law study circle.

You have joined one law study circle, but many exist, so it's best to say you joined "a law study circle" Also, while "circle" works here, more commonly used english words are "group", "club" or "organization". Consider using one of those instead.

I have (now?) joined the law study circle. I have (now?) joined the law study circle.

In addition, I'm thinking which circle Iabout joining Yosakoi circle and or walking circle. In addition, I'm thinking about joining Yosakoi circle or walking circle.

"joining yosakoi circle or walking circle" is the action you're considering. "thinking about ..." is how you'd say that you're considering an action.

In addition, I'm thinking which circle I joinabout joining the Yosakoi circle and the walking circle. In addition, I'm thinking about joining the Yosakoi circle and the walking circle.

However, I would only use the word "the" in front of other words, if I had a particular club/ circle in mind. So not just any Yosakoi circle, but one particular Yosakoi circle - the one at my school for example.

My hobby isies are watching TV and eating! My hobbies are watching TV and eating!

Since you have more than one hobby, use "hobbies" instead.

My hobby isies are watching TV and eating! My hobbies are watching TV and eating!

EI especially I like hamburger steak. I especially like hamburger steak.

Me too, I just had some for dinner today!

EI especially I like hamburger steak. I especially like hamburger steak.

In order to speak fluently to be a TV director, I want to study English hard. In order to speak fluently to be a TV director, I want to study English hard.

In order to speak fluently to be a TV director, I want to study English hard. In order to speak fluently to be a TV director, I want to study English hard.

Please talk to me with friekindly. Please talk to me kindly.

"friendly" is a descriptive word. It describes actions or behavior, but isn't something that you can have. You could say "Please be friendly", but "with friendly" isn't really ever used.

Please talk to me with friendly. Please talk to me friendly.

As already mentioned in the correction post made by somebody else above, the word friendly should not be used in this case. People would understand you though.