戸籍上 / パン屋を目指して... / と / どうする / 用法

Hello,

1. これはおそらく戸籍上の出生年月日を調べた上で修正したのではないかと思います。

Translation given: "I believe this may be a correction after investigation of his date of birth in the family register."

I understand 戸籍 means "census, family register", but what is 戸籍上? Could it just mean "in the family register"?


2. We've previously been told that, when she was a little girl, the author wanted to run a bakery. Later:

もしかしたら何年か後にパン屋を目指して頑張っている自分がいるかもしれない。

I'm having difficulty figuring out this sentence. My best guess:

もしかしたら = Perhaps
何年か後に = in a few years
自分がいるかもしれない = (I) myself may be
パン屋を目指して頑張っている = (someone) who is working hard towards (owning/running) a bakery

Is this anywhere close?


3. 筆者の子供のころの夢と実際にすることになった仕事は何ですか。

Does と mean "and" here? I.e., is it asking "What was the author's childhood dream, and what job did she actually end up doing?"


4. 筆者はこの後、「卒業文集」をどうすると思いますか。

My translation: "What do you think the author will do with her graduation anthology now?"

Is this OK, especially in terms of subject of 思います and interpretaion of どうする?


5. This is from a vocab list:

[補助動詞] （～て）くる/いく （※変化の用法）

Does 変化の用法 mean something like "(these constructions are) used to indicate change"? I couldn't exactly get the sense of 用法.

1)
Yes.

［接尾］名詞に付いて、…に関して、…の面で、…の上で、などの意を表す。「一身―の都合」「経済―の理由」「行きがかり―そうせざるを得なかった」

Click to expand...

上（じょう）の意味 - goo国語辞書

2)
頑張っている自分がいるかもしれない ＝ （私は）頑張っているかもしれない
There might be myself who is working hard... = I may be working hard...

3)
Yes.

4)
Yes, both are correct.

5)
Right. 用法 is a noun meaning "use/usage".

Thanks Toritoribe!