How difficult is it to learn to tailor a shirt?

JeffC asked:


The only thing I would like to do is take in the sides 1-2″. I suffer from broad shoulders and thin waist. Every shirt fits my like a parachute. Even slim ones - because I have to size up to accommodate the shoulder.

Im willing to buy a book, sewing machine, and learn this.

How difficult is it? please advise!

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