Why is the F chord so hard?
Because a barre asks one finger to do what four normally share, at an angle your hand has never used. It is the one place where the answer really is time rather than technique — three minutes a day for a few weeks.
How is this different from the 30-day plan?
Thirty days gets you four chords and three songs. Twelve weeks doubles the chords, adds barres and a capo, and ends with you able to play for someone else.
Should my guitar be set up by a shop?
If the strings sit high off the neck, yes — a cheap setup can turn an unplayable guitar into a pleasant one and it is the single best money a beginner spends.
Can I learn from videos alone?
For three months, comfortably. Get a teacher when you want to sound like a specific person, or when a bad habit is costing you more than a lesson would.