I have no advice on learning how to play metal, but I think these are some useful things to start with just to get you playing something and feel like you are making progress (probably in this order? someone else can chime in):
- learn how to tune the guitar to standard tuning (EADGBe) so you can keep your guitar sounding good when you play it. You can buy an electronic tuner, hook it up to your Squier with an instrument cable, and use that to help you tune the guitar. You'll eventually know what in-tune sounds like and be able to tune approximately by ear.
- learn the fifth chord aka "power chord"; the power chord can basically be played at any position along the neck of the guitar, and this chord alone will get you through the melodies of a fair amount of rock, alternative, and punk
- learn the open chords so you can put together some melodies. You can buy chord books to help with this, though these books have all sorts of chords in them beyond the open major and minor chords.
- learn the major, minor, and pentatonic scales so you can start putting together some solos. Don't worry about speed so much, you want to learn how the notes fit together on the neck of the guitar first. Again, you can buy books for this.
- learn barre chords so you can play chords at different positions along the neck of the guitar. These will be in the same chord book you purchased earlier.
Also, I don't know where this fits, but somewhere in there, pick out some easy songs you want to learn how to play and learn those. That way you have something to fall back on that's fun in case you struggle with any particular thing, and you also have something to work towards. My personal fallback is playing along with a Jimmy Eat World album.
A couple asides: it's a bit pricey, but you could pick up the Rocksmith video game to use as a real-time feedback teaching tool for learning specific songs. It's got a pretty diverse song catalog, too, so there's lot of stuff to try. A step removed from that, I found the Rock Band video games on Expert difficult really useful for developing some basic muscle memory for strumming patterns. That much does translate to playing the real thing.
A useful online resource that covers the above and more: Wikibooks - Guitar
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