1. 我之后做什么呢？(lacking modal verb such as "该" "应该" "要" "应当", which means "should")

我以后要做什么?

我会在七月完成我的硕士学位, 所以我得决定接下来想做什么. 

3. 我现在试图决定是否去意大利当经理。("试图" and "是否" are too formal)

眼下我正试着决定要不要去意大利当经理. 

4. 我知道那个工作很好，不过我也想去欧洲，因为好像比较探险。(wrong words. "探险" is a noun, not an adjective)

我知道那是个好工作, 不过我还想去亚洲, 那里似乎更像是个探险. 

5. 虽然我不老，我也不年轻了，所以我的想一想我的将来。(notice that "的", "得", "地" are homophones. )

虽然我年纪不算大, 也不小了, 所以我得想一想将来.

6. 有人说人生好像下棋所以必须想想好，想想慢。("所以" seems redundant when the logical connection is distinct.)

有人说人生就像下棋, 必须作一番思考. 

7. 也有人说人生好像弹琴，如果我们不现抓的话，没有魔术。

也有人说人生好像弹琴, 如果你不即兴弹奏, 就没有魅力. 

8. 我还不知道我是什么种的人。。。("什么"=what,)

我还不知道自己是哪种人.

In July, I will finish my masters so I need to decide what I want to do afterwards. At the moment, I'm trying to decide whether I want to go to Italy to become a manager or not. I know it's a good job, but I also want to go to Asia because it seems like more of an adventure. Even though I'm not old, I'm not young anymore either so I should think about my future. There are some people who say that life is like chess and that you have to think a lot. There are other people who say that life is lile playing the piano and that if you mever improvise, there cant be any magic . I still don't know which type of person I am...

好好想，慢慢想。

什么类型（种类 一般是指物体）