I did have a quick blast of some of them, but yeah, these compositions are at the extreme end of difficulty and the definition of running before walking which will make the process of learning much much harder.

What you want are fairly middle of the road rock songs that you like, that you can learn and progress with. Then for the type of playing you're ultimately aiming for, you'll also require heavy practice on scales and improving speed and strength.. This is a long term goal and definitely not an overnight challenge

Bear in mind also that on a lot of those metal albums the guitarist is using open or dropped tunings to make the chugging bits easier, as well as a ton of effects.

When I was learning I did find that having some distortion, overdrive or fuzz on helped to mask some of the mistakes I was making and let me continue playing until I improved.

I might recommend learning something by Queens of the Stone Age or similar. It's metal ish but definitely more playable. Either way, get to the point where you can play the chords to some way simpler songs you like first, then start looking at lead/solos once you have the rhythm down, then start learning fifths and modes and stuff, as you will need to know your scales if you want to shred

Best of luck!