starting topic, could you help me

Hi everybody,
I started write English topic to improve writing skill, but I don't know where I'm wrong in topic (grammar, vocabulary, tense, ..). I really want to learn English effectly, could you show my mistake in topic. Please help me :-). Here's topic:

I moved to the new company one month ago. It's a big company with more 2000 employees, an USA-based company. When I have started my work, there're many things making me surpricing. I have my own table, UPS (for PC box) and a private space, it's cool.

I meet many guys at my floor and company, of cource I don't know them. When I go somewhere, like get water or go to rest room (WC), and meet any guy on my way, then they usually smile with me so i would reply them. Poor me, God created my face not easy to smile so it's hard to do that .

Luckily, some guys in firm appoint me to potent team named Bamboo. Actually, they're a GREAT TEAM. Bamboo have many things I have even hoped: professional, united, potential and passionate.
Currently, Bamboo have been developing a new product for USA market and use latest Microsoft's technology (SharePoint). If I be a member of team, it's wonderful. Because they have researched SharePoint (and some relevant stuffs like NET 3.0, Enterprise Library) for a long time, so I have many thing to learn before I can start working with them. I can't image how cool when I received a bug of some components that I have implemented from QC