Courage = When you play first, at start of every match one person gets to play the first card. If that is you Courage will work this round and round 3, if it's the opponent courage will work round 2 and 4.
Confidence can work basically every round except first. As long as you won the previous round confidence is activated. If you don't win any rounds it won't be activated this being said if you win first round, lose second and play confidence on third it won't work it must be directly after a victory.