Why I don't speak English well

Why did I use that title instead of "why I am learning english?". I will say in this text, what I  did wrong and which mistakes I made in  learning.
I started learning English about 12 years ago, when i was in primary school. There I learnt the basics of the English language. Becouse I didn't have chance to use it, I was learning from lesson to lesson. When I finished school, I had quite a good grade.
When I started high school, I started learning from the beggining. Many friends from primary school spoke Russian. Of course it was good a time to learn more and to learn better. But, I have wasted this time. After high school I had a lot of problems getting into university. I started paid studies. Then I decided to correct all my mistakes.
The first year was very difficult. There was something interesting things, I didn't have English. Because I had a lot of work to do in my studies, I could not take an additional language course. I had two years when I didn't practise a foreign language.
I had a language course in my third year of study. But during the brake in learning, I had forgotten a lots of things: English grammar and many words. On the other side my studies didn't become easier. I was learning english only to pass an exam. 
The first time I had to use English, was when I wrote my thesis. I chose difficult title and I had books only in English. I graduated studies with a good grade, but my English was at a low experience level.
Now I will start a Master Degree. I want to continue repairing the past mistakes, and want learn english enough to be able to read book easily and speak the language fluently.

Why I don't speak English well

Why did I use that title instead of "why I am learning english?" I will say in this text, what I did wrong and which mistakes I made in learning.
I started learning English about 12 years ago, when I was in primary school. There I learnt the basics of the English language. Because I didn't have the chance to use it, I was learning from lesson to lesson. When I finished school, I had quite a good grade.
When I started high school, I started learning from the beginning. Many friends from school in primary school spoke Russian. Of course it was a good time to learn more and to learn better. But, I wasted this time. After high school I had a lot of problems with getting into university. I started paid studies. Then I decided to correct all my mistakes.
The first year was very difficult. There was some interesting things I didn't know in English. Because I had a lot of work to do in my studies, I could not take an additional language course. I have had two years when I didn't practise a foreign language.
I had a language course in my third year of study. But during the break in learning, I had forgotten a lots of things: English grammar and many words. On the other side my studies didn't become easier. I was learning English only to pass an exam.
The first time I had to use English, was when I wrote my thesis. I chose difficult title of thesis and I have had books only written in English. I wrote and defended (?) the thesis.
Now I will start a Masters Degree. I want to continue repairing the past mistakes, and want to learn English enough to be able to read books easily and speak the language fluently.