I feel once you are comfortable with your barre chord shapes you are well on your way to playing about anything on the guitar. It should really be everyone's goal to get those down, as once you do so much opens up and your guitar playing life really becomes a lot more fun. Stick with it.
So much of practicing barre chords is just routine practicing and finger strength.
One thing I have students do in the beginning is simply practice placing your pointer finger across all six strings on one fret. Make sure it's at the bottom of the fret. Place that finger across the first fret and make sure when you pick each note you can hear it. Once you can hear each note you are fretting, than move to the next fret. It will get easier the further you move up the neck, so start there.
Hopefully this helps? :confused:
Douglas Showalter