1. In the US we never say "get on well". I would say that I hope that we get along well or that we have a good time together.
2. I have got 2 sisters. Should be changed to I have two sisters. The got is not necessary here and sounds awkward.
3. Instead of keen on: Here we would say, I also really enjoy Computer Sciences.
4. I like hanging around should be I like hanging out with my friends.
I only say these few little changes because some people who are not familiar with the way they speak in England or Ireland might not be sure of the meaning of these words.