RE: focus when flying combat?
you are on the right track, dont wory about the sticky for a while, its fun to count drapes while practicing, sticky if your keeping score.
When most start you furball in the middle of the field and try to find a target or make dive in passes at others. As you get comfortable, you start to follow streamers and eventually following planes towing streamers. the best practice really is one on one, have someone be a rabbitt and try to follow them and get position on them to get the streamer. Alot of times I still cant tell who im following just that i am chasing the one ahead of me. There is a neat video and discussion on the RCCA web site under tactics about that sort of thing. it takes time to develop pursuit skills for most people.