You should search a little about the teams and their history before predicting. If you're not familiar with cricket or have not much experience then its like playing darts in the dark. There will be matches when most obvious teams you think are going to win might lose against smaller teams who have done well in world cups before. There's always upsets, you just got to be vigilant.

No problem, you can always join the pool once again just by zapping the pool for a 10% of the total pool prize on the day you rejoin. In starting it will be negligible, so it's better you lose early... Hahah