Practice takes commitment. Guitar is rough because you need to keep your fingers limber and calloused. Even if you manage to memorize the chords, pick up enough music theory to understand progression, or just copy an existing song, you have to keep at it for a long time to get good.

The best weapon i've seen for this is rocksmith, which gameifies learning.

but, if you re' like me, and well we're here right? you'll buy it, commit enough to start making progress the forget to unsubscribe.