In my experience, the problem most beginners have with barre chords is that their left hand position, specifically their thumb, is what holds them back from executing barre chords effectively. To help remedy this, I'd advise you start out by playing this:

---0---
---0---
---6---
---7---
---7---
---5---

Doing that shape will put your hand in the correct position, and it doesn't sound harsh. Get used to that and then gradually move to barring the b and e strings.