Invariably, a major problem a beginner fly tier has is fly proportion. Fly proportion = the amount of and length of materials and where they are placed on hook to form a fly where the individual parts have the correct relationship to each other. Here is a must read article by Charlie Craven on dry fly and nymph proportions. http://www.flyfisherman.com/2013/12/13/tying-flies-beautiful-flies/ Here's a related article on tying hair wings. http://www.flyfisherman.com/2014/01/30/mounting-hair-wings/ I suggest saving these articles as PDFs that you can refer to as needed. FF often takes done the articles after they have been up for a while. The above URLS may not work in a few months.