Your team number indicates you are a pretty new team. I would suggest two things:
1) pick a language and start
right now (I typically recommend that teams start before the season getting familiar with the programming environment. You have a bit of catching up and will be better served by putting in time than listening to the endless discussion that C++ vs. Java usually provokes
)
2) if there is a local team that is willing to support you (many larger older ones are extremely helpful) you might want to use the language they use, as experienced help standing next to you is worth a thousand posts. That said do not despair if you don't have local resources, request here often generates a thousand posts
Good Luck!