Can a native speaker of English check structure and grammar of the sentences, thanks?

Today there was something wrong with the monitor of my computer,so I asked a maintenance worker to mend it, to my surprise, then the mouse refused to work, so I had to replace it with a new one, however, it didn't fit my hand at all. I still prefer to the former one. I would spend a long time on computer everyday, both for work or fun, and I have been living such a life for many years. I have used two computers, which are all bought by my mother. I hope I coule manage to buy new one with my own wage.