The Plans for the coming vacation ("The plan," can be ok, but it would need to be a complete, single plan.)

I am so busy these days, .and but now, I want to make a plans for my coming vacation. My classmates and I are going to have a great journey in Yunnan, China. The sights there is are beautiful, right? and We can eat more special some unique food there, hehe, and I want to climb the mountains to help keep good health~!! We may will / should have fun there... Oh, I can not wait! But for now, I have to get ready ("prepare" is better) for the final exams. ^_^ fighting！ Wish me luck!

A few notes:

"My classmates and I are going to have a great journey in Yunnan." Journey is a bit of a formal word. Saying "we will have a great journey" sounds like a fun way to express your excitement, such as "We will have an AMAZING JOURNEY!!! \(^o^)/" If so, you can leave it the way I wrote it. If you want to say it normally, say: "We will go on a trip to Yunnan."

"The sights there are beautiful, right?" To me, "right?" is like "对吧？"; you a confirming something with the other person. You can't expect everyone to know about the sights in Yunnan, so this doesn't work. However, I don't know what you meant to say, so please try it again, or tell me in Chinese. :)

"We can eat more special food there." I changed "more special food" to "some unique food," but I am only guessing. Please also try this one again, and/or write it in Chinese.

"We may have fun there" = "We will maybe have fun there." You sounded excited, so if you are sure you will have fun, you should say "We will have fun." If you want to say that you feel you can expect to have fun, say "We should have fun."

"But for now": Informally, it's ok, but it's not correct. In good writing, use "However" instead of "but." Maybe you already know this, but I'm just making sure. :)

"Fighting!" Ok, obviously that's from Korean, so it's ok to keep it. There's no single equivalant in English. If you want to talk about what you will do, you can say "I'll study hard," but here is something interesting: when you are talking to someone, the other person will usually tell you "good luck!" or "study hard!" Therefore, if it is only you talking, you may ask the other person / people "Wish me luck!"

Next time, please write your entries BOTH in Chinese and English. That way, it is easier for us to see what you wanted to say. :)