Sprawdzenie czy są błędy

Witam
Proszę o sprawdzenie poniższego, króciutkiego tekstu, czy nie ma błędu:

I have always been interested in computers. My father is a computer specialist and works with an own company. We have a PC at home of course and my father often shows me interesting tricks. I have learnt a lot from him. I also learn a lot by myself. I spend much time working on my computer. Sometimes I play games but most of the time I learn new things about IT. For me it is the greatest fun.

Z góry dziękuje.

My father is a computer specialist and works 'with an' IN HIS own company.
For me 'it' (moze lepiej THAT) is the greatest fun.

myśle ze chodziło tutaj o IT (information technology) a nie o 'it'.

oj przepraszam pomyliłem zdania ;)