Am I right?

Recently I've met in a text such sentence: 

Since I sold my bike, I had walked to school every day.

By using Past Perfect in this sentence the narrator means: first he began to walk to school, and then he sold his bike because he didn't need it anymore. 

Am I wrong in my conclusions?

Maybe it would be better to say: 

Since I had sold my bike, I walked to school every day.

help by using tenses!!!!!!!!!!!!!!!

Could evryone explain me why I've done the mistake in the following sentence:

So, the task is "put the verb in the correct form":

<em> How sad! George (dream) ... of going to California before he died, but he didn't make it. He (see, never) .... the ocean.</em>

<em>
</em>

<em> </em>My answer is :

How sad! George (dream) has dreamed of going to California before he died, but he didn't make it. He (see, never) has never seen the ocean.

 

And the answer key is:

How sad! George  dreamed of going to California before he died, but he didn't make it. He  never saw the ocean.

 

WHY  PAST SIMPLE!!!!????

I've always thought that we use past simple when there is a specific time.There isn't the specific time in the first part of this sentence. And the action didn't finish in the past. That's why I choosed present perfect.

And there is a word "never" in the second part of this sentence. Iit's  experience in his life!But the correct answer is past simple......

 

When we should use present perfect and past simple? 

 

 

 

Quastion: expression of time in a complex sentence I've read recently the following sentence: "After Anna learned about it, she decided to rent a different apartment". I am confused about its gramatical structure. I suppose the first part of this sentense should be in Past Perfect "After Anna HAD learned about it..." Because this action happened before her decision to rent a different apartment. But at the same time the action can be simultaneously: she learned and decided at once. Can we use in that case in the both parts of the sentence Past Simple?

About me Studying foreing languages is my hobby. I really find it very interesting and exciting. First of all I belive that the language is a reflection of folk's culture, theirs thoughts. I can also speak a bit German. One day it came into my head to translate a text in English using a German dictionary. I was astonished when I managed to do it.It was so gripping. Since then I study foreing languages. But I have in mind that my hobby is really difficult. It takes a lot of time because every man who want to speak fluently in other languages needs practise to improve his knowledge.