Through getting rid of the bad habits and working hard, I think I will be happy and become diligentmore hard-working.

The following three paragraphs are the goals that I want to realize next year.

You can also use "achieve" in place of "realize"; this is the more common way to say it but both make sense.

First, I want to attach great importance to Chinesprioritize learning Chinese.

The way you wrote it is grammatically correct, but we usually wouldn't say it like this. "Attach great importance" does not necessarily mean you work hard at it, but the verb "prioritize" does. You may have translated it this way because the way I wrote it in Chinese was not very natural, 不好意思哈哈哈

I want to pass HSK 5 in 2021.

Although my spoken Chinese is not bad, there is a lot of HSK 5 vocabulary that I haven’t studied.

Besides,Additionally, there are many characters that I don’t know how to write, and I can only type; I only know how to type them.

Moreover, I can’'t write themvery fluently, and I have to look at some words that I am unfamiliar with in a dictionary when I am write theming.

This was my original meaning, I was referring writing in general instead of the characters, but again that could have been unclear in my own writing.

I think if I study hard, watch more Chinese TV shows, and write more journals, maybe I canI might be able to do it.

Apart from this, I want to read afinish a Chinese book this year.

My plan is that every day before I go to bed, I read it a little.o read it a little bit every night when I go to bed

In Chinese, the time phrase usually goes first, but in English we can put it towards the end and I think it sounds more natural.

Secondly, I want to learn a new foreign language: Swedish.

My cousin is German, and hiser husband is Swedish.

I want to get along with them well, sobuild a good relationship with them, and therefor I want to speak Swedish.

My goal is that by the end of 2021, I can takhave a 15 minute chat in a row in Swedish without a single English word.

I also knowthink that it’s will be difficult to achieve this.

I only know some simple Swedish words and sentences, but I don’t even know a little of some Swedish grammar and many wordsas for Swedish grammar and many Swedish words I do not know at all.

The last plan has nothing to do with a foreign language.

You can also say "unrelated to studying foreign languages"

BasicallyIn general, I think I am a good person and I am very friendly to others, but because I am always shy, I usually avoid helping others.

I think I should develop my stylego out of my way to help others.

好像我写错了我的论文，这是我原来想表达的，不好意思哈哈哈哈~ 发场风格的意思是主动帮助其他人吗？？

Next year, I want to join more public welfare activities.

也可以说"charity events" instead of "public welfare activities"

Thus, I amis way, I can be more useful to our society and I hope Ifully can make myself happy.

I also have some small New Year’s resolutions, but I am afraid of pursuing too many goals, and I don’t want to put too much pressure on meyself.

Everybody, come onGood luck, everybody!

The New Year's is coming.

In China, you have passed the New YearNew Year's has already passed, but in the US, January 1st hasn’t comearrived yet.

ThroughBy getting rid of these bad habits and working hard, I think I will be happy and become more diligent.

The logic here is weird: "working hard" leads to "being diligent" = "working hard"

The following three paragraphs are the goals that I want to realizachieve next year.

"realize" is okay, but generally we "achieve" our goals.

First, I want to attach great importance to Chinesefocus on learning Chinese.

"I want to attach great importance" is correct, but nobody would say it.

I want to pass HSK5the HSK5 exam in 2021.

Besides,Moreover, there are many characters that I don’t know how to write, and I can only type.

Moreover, I can’t writuse them fluently, and I have to look atup some words that I am unfamiliar with in a dictionary when I write theming.

It's unclear what "them" refers to. I feel "when writing" feels more precise.

I think if I study hard, watch more Chinese TV shows, and write more journal entries, maybe I can do it.

Apart from this, I want to read a Chinese book this year.

My cousin is German, and his husband is Swedish.

This is correct, provided it's a gay marriage.

I wantn order to get along with them well, so I want to speak Swedish.

My goal is that, by the end of 2021, I can take a 15 minute chat in a rowto be able to chat continuously for 15 minutes in Swedish without a single English word.

I don't think "My goal is [that]... I can..." is correct.

I also know that it’s'm aware that it would be difficult to achieve this.

The "also" doesn't make sense here. "I know that" feels less precise than "I'm aware that".

I only know some simple Swedish words and sentences, butand I don’t even know a little of someny Swedish grammar and many words.

"and many words" is implied by the first part.

The lastMy third plan has nothing to do with a foreign language.

Basically, I think I am a good person and I am very friendly towith others, but because I am always shy, I usually avoid helping others.

Being "shy" is a character trait; it doesn't change quickly (cf. "I am always happy").

I think I should develop my stylepersonality.

Next year, I want to joparticipate in more public welfare activities.

Thus, I amIn this way, I will be useful to our society and I hope I can make myself happy.

I also have some smallminor New Year’s resolutions, but I am afraid of pursuing too many goals, and I don’t want to put too much pressure on meyself.