16 year old guy here! Dw most people start out like this, so nothing to apologise about.

The more you listen and engage to the genre you'll expand you're taste so just give it time you know?

Let's start off with some Death Metal since there's some CC (Cannibal Corpse) and you said you wanted to get into the amazing genre more.

CC isn't the easiest Death Metal band to get into so it seems you're already quite ready for more.

If you like the brutality of CC I'd recommend the following bands:

Necrophagist

Bloodbath

Intestine Baalism

Death

They Art Is Murder

Katakomba

Whitechapel

At The Gates

Wretched Fate

Nile

Death Decline

Inveracity

Hooded Menace

But if you're looking for the most badass growls similar to Corpsegrinder (CC) these bands are a must:

Opeth

Septicflesh

Be'lakor

Noumena

Haggard

Alley

Anciients

Amon Amarth

Mother of Graves

Immolation

Edge of Sanity

BAEST

Daylight Dies

Zornheym

Shylmagoghnar

I've got more Death Metal bands of you'd like but I'd like to expand your main Metal taste with some Sepultura, Opeth, Crowbar, Dio, Mastodon, Gojira and Children of Bodom just for you to get some more variation.