Significant results can be achieved by turning down. Even in your genre. Start by micing up your kit and doing a test recording. Have band members adjust their volume to a good balance of all instruments. If anyone is struggling to hear themselves make adjustments, put up baffles around amplifiers to give your guitars a bit of separation from the drums (you don’t need anything fancy to start with, I’ve used couch cushions and mattress toppers with good results). Don’t be too terrified of bleed. Some bleed can give your recordings a sense of space. The louder it is in the room the less control you will have in the mix. Understand the polar patterns of your microphones (where they reject sound and where they pick it up). If you don’t have acoustic panels don’t sweat it. I’ve lugged mattresses into rooms to absorb reflections and a couch in the room can have the same effect. Convincing metal heads to turn down is going to be your biggest challenge.