Hey man, can I make a suggestion since it sounds like you're kinda starting out? Honestly, if you're playing more modern (like, after 1985) heavy stuff,
start with a set of EMGs. Really.
For high gain (as opposed to blues or jazz or classic rock where you never get past "crunchy"), pickups are not the most important part of your "sound" as long as they're pretty high-output humbuckers. I'm not saying they don't matter, but speaker changes, a different boost pedal, dialing the amp differently, or even just a different tube in V1 will almost always make a bigger difference. Pickups are also pretty cheap to change later compared to cab/speakers or amp or guitar, or even a decent boost.
EMGs will give you a really good 'baseline' because, like you said, everybody uses them. That's because they generally play well with any high gain amp, they're balanced between being meaty enough for riffing but not woofy or loose in the lows, they have enough highs for shredding, and they also do cleans well enough. I'm not saying "they're the best", because that's an individual thing, but they're a standard in metal because they're really good for metal.
Then once you've got a feel for EMGs you'll always be able to ask 'what does that sound like compared to an EMG81' because, again, it's kinda the standard, and you'll know how that EMG sounds and feels to play. Then you can try other pickups and actually know what people are talking about
Same reason that you should always try to get your hands on a Recto or a 5150/6505, even just for a good test drive - they're common amps in metal for really good reasons.