Probably a stupid question, but what can I do to 'degoogle' a Google Pixel 8?

Just switched to a new phone carrier, and they had a promotion that included a free phone: the Google Pixel 8. I'm not a fan of Google, but I am a fan of free, so I took the bait.

It's already bombarded me with pitches for their new AI bullshit. I've opted out of as much as the settings allow, but I'm under no illusion that doing so actually provides any real privacy.

So, damage control time.

On my previous device I used YouTube Vanced for music and videos, but I guess Vanced isn't around anymore, and I'm pretty out of date on what the current options are... any insight on streaming specifically?

*I'm a medic who's only surface-level competent with tech, so please idiot-proof any instructions.

Thanks all!