I have been having trouble with the F barre chord and have a question about mechanics. As an experiment I've tried moving the body very far to the right so that my eyes are somewhere over the seventh fret. Completely impractical for playing but I wanted to see what would happen if I could get my forearm almost exactly perpendicular to the neck. In this position it is relatively easy to play the chord.
Now when I move the guitar back to a normal playing position (casual for me), my left forearm instead of being square is now at an angle to the neck (because my left hand has to now reach left to access the first fret). So I find to get proper mechanics i.e. Fingers fairly square to the fretoard, I have to either stick my left elbow out to square my forearm or else twist my wrist at a weird angle so that at least I can square my palm. If I don't square something I can press the strings with some difficulty but my fingers end up side on rather than front on.
What are the proper mechanics for playing this chord?