Watch the Sittin At The Barre online guitar lesson by Corey Congilio from 50 Blues Rhythms You MUST Know
When I'm teaching beginners, I usually start with open or first position chords. Then, I move on to barre chords. I always tell my students that barre chords will physically be the hardest thing you play. If you're a beginner, take your time with these barre chords. I believe that once you've pushed your hand to its limit, it then becomes comfortable and trained to go there.
Don't ever expect to get a barre chord position on the first try.
This example is a shuffle and I show you two versions of the I chord (A7). The IV(D7) and V(E7) chords will use the same shape. These shapes are really the first moveable shapes we'll tackle. What's great is that you can move these chords anywhere on the neck. We often call this transposing or changing keys. You can get years of mileage out of these barre chords so, make sure you really understand them before moving on.