Whatever you do, DON'T give up. You won't be a rock star in a week but you can learn a lot in a short time if you set an good practice routine for yourself.
Your best bet is to find an instructor who will show you the path.
A little bit of structured learning can be invaluable to the rank beginner.
I felt exactly like you do now....only it was in 1966!
Welcome to the asylum, pull up a rock and play!
Dan