What difficulties do you encounter with the custom ROM stuff?
If you get a oneplus, they are very forgiving of things you could do to brick a phone.
A recent oneplus and installing a custom ROM (LineageOS + MicroG) would be fairly doable for a larger audience than just the "nerd" or "hacker".
If people know what you struggle with particularly, they can help better.
To get rid of google completely, a custom ROM or other technical things are necessary, but debloating using a standard tool is a good first step and is better than what you will have from the off.