Your asking for someone to write a book to answer your question.

I would suggest fishing a few open matches and do what your good at. Keep an eye on the anglers around you and attempt to learn as you go. I would also stress that following the scales and asking loads of questions about how others caught will give you more than enough info to be able to start to compete. However, Heronbrook is a difficult nut to crack. Top anglers who know the waters inside out and quite a lot of different ways of catching the fish.