Hi and welcome.

I agree with fuzz, you might as well try fund 2, since you've paid your fee and might as well see what can benefit you.

I can only speak from my own experience, but I was in the camp of taking in lots of information and then sorting through it to find out what I really wanted/needed to focus on. And I am glad I did even though I only use a fraction of it.

I don't listen to much metal other than JP and Volbeat (favorite).

In the song Livin after midnight I dont start with the conventional barr chord on the 5th string 7th fret, I much prefer starting out with the open E and I get that big heavy 6th open string involved. It adds a lot of meat and heaviness, try it out and you will see what I mean. Really darkens the vibe. But if I didn't know alternate voicings I probably wouldn't have known this. I don't think anyone can learn every chord, but I think we benefit from having a bag of chords and various voicings.

We all walk our own path, whatever you decide to do, good luck to you.