If you don't want to keep switching to your secondary but more commonly used account, it's time to change the default. When ...

That's when it's time to change your default Google account and therefore prioritize a certain one over any others you have. That way, you'll see those emails first, but you'll be able to switch ...

You can change your avatar anytime in the Settings menu by selecting the profile you want to update. In Android 15, the avatar picker lets you choose your Google account picture as your avatar.