I understand your pain! I felt the same way last night - I wanted to start learning paper piecing, but no matter what I did, everything was wrong. I lost my nifty small scissors I use to rip seams, I couldn't get the pattern to print out the right size, then not at all, and then I sewed the fabric on wrong!
In the end, I said to myself "I know when I'm beat!" And I retired for the night.
Take a break, but don't give up!