[Harp-L] two questions from newbie

["Igor" <igobox@xxxxxxx>]

Dear All,  
  
Sorry if somebody already asked such a questions, I couldn't find in archive.  
  
I strated to practice diatonic harp(C-Key) starting last summer, but I didn't use any system  
in my exercises.  
But it's already one and half month as day by day I do recommened exercises  
using metronome. My daily practice is about 45-60 minutes.  
  
Sometimes my lips are trembling and badly tired, that I even cannot play in row  
several single notes.  
  
1)Please advice how much time I need to spend per day practicing the instrument.  
  I can understand that it's quite individual depended, but in any case would be welcome to hear  
your opinion.  
  
2)The second question.  
 What metronome speed I need to use during exercices e.g. to play scales etc.  
 It seems that I can play pretty good e.g. C-Scale at metronome speed 54, 60, 70,  
but cannot handle it at speed 48. Since it takes much more efforts.  
  
Please advise.  
  
Thank you.