Nope - it's normal... First try to practice a bit playing and whistling/humming (?) along... Later try to sing... Practice, practice, practice... BTW If ya read some interviews - many musicians tell, that it's hard. So they when they write songs... They write 'em, be be as easy as possible to sing and play at the same time ;) That english :)
Nope - read how pickup works... Anyway you need to use metal strings... Otherwise you should use micro or piezoelectric sensor (hope that's correct english name of it ;) )
Powerwolf and Xandria (since "Neverworld's End) would be nice... But I think that now there aren't any Xandria's CDLCs - it's rly hard to get even any tab from last 2 albums...