I know it might not be easy, but the quickest learning will be done at a contest, a local `unimportant' one is best. After your flight start asking questions of your caller and judges, these guys probably see a lot of flights and whilst you may not like their answers, if you want to win listen carefully to what they say and start to practise what they say. The trouble with lone practise is that you might be practising the wrong stuff, and you then ned to un-practise all the bad stuff before you progress. Lines and angles is what it is all about.
Evan.