I Love Paper Piecing! I just recently taught my first class for it at my Guild. If you are sewing straight on the lines you shouldn't have any problems. What exactly are you having issues with? I'd be happy to help if I can.
Carol Doak has a great pattern for practicing....Introduction to Paper Piecing....
http://www.caroldoak.com/free-quilt-patterns.php
and also a very good tutorial on the Quilters Cache Site...
http://www.quilterscache.com/StartQu...tingthree.html
If you have any questions I'd be happy to help.....Good Luck, don't give up, yet!