Barre Chords are one thing you that will increase your knowledge of the guitar very quickly. Practicing them will also improve your finger dexterity Just by learning a few open chords you will open up your options to hundreds of different variations of sounds.
Once you master the barre chords using the e major form, the A minor from, and the A major form you will know 80% of all the chords every played in rock and blues music. If you already know the open chords and have good finger dexterity and strength from practicing the open chords, learning barre chords will be a breeze and it will just take a little practice. It won't take long for you to master the barre chrods but it will open up the doors to hundreds of new songs.