Headphone distribution amp with VU display

I'm a musician hobbyist and class myself as a beginner. I don't really know what I'm doing... would somebody be kind enough to take a look at my plans?

I'm trying to design a headphone amplifier that will take an audio signal from a laptop (line level, but quite low), and drive 3 sets of reasonable quality headphones at good volume. I also want to add a VU display, which I intend to calibrate to the laptop audio software. The idea is 3 people working on an audio project can hear what they're doing, and the VU is mostly for fun.

This is what I've come up with for the audio side of things. I've not designed the VU display etc. yet.

Does it make sense? Any obvious mistakes or improvements?
 

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