From Rome to London (through Berlin)

Hello World!
I'm Stefano a 32 years old from Rome. I work as an IT Programmer for 8 years,  and I've been living in London for 7 months.
Previously I have lived in Berlin for 6 months.
I think my English is pretty decent, but I still make many mistakes!
I would like to improve my English as much as possible because I'm not feeling 100% confident when I have to speak with people (and because I'm planning to stay here in London for many years).

// Pretty good.  One HUGE correction is the word "actually".  In English, it means true, in fact, real (not false, hypothetical, unrealised). For us, it has nothing at all to do with time (present vs. past).  It is a "false friend" that many Italian and French speakers - otherwise very fluent in English - fail to recognise.

From Rome to London (through via Berlin)

Hello World!
I'm Stefano, a 32 years old guy from Rome, I'mve been working as an IT Programmer since for 8 years and I'mve actually been liveing in London since for 7 months.
Previously I have lived in Berlin for 6 months.
I think my English level is pretty decent, but I still make so many mistakes!
I would like to improve my English as much as possible because I'm not feeling (or I don't feel)100% confident when I have to speak with people (and because I'm planning to stay here in London for many years).

Very good Stefano, just a couple of errors with for/since and present perfect.

I did my teacher training course in London at International House. In order to give the teachers practice they offer cheap lessons to students, £50 for 40 hours (2 hours every weekday/afternoon for four weeks). It might be a good way to practice your English and meet other learners. There were quite a few Italian and Spanish students when I was there and I even watched the final of Euro 2012 with them - although you might not want to remember it!

http://www.ihlondon.com/learn-english/general-english-courses/english-practice-lessons/