Change steam name / hide games?

I recently created a Steam account. But where I circled in black is the name of the email. This means that everyone who shares the laptop can see it. The second problem is that everyone can see what I've downloaded. All you have to do is look in the library. Can I hide these games so they can't see it anymore?

Who are they all? Who or what do you share your laptop with?

Just log out of Steam every time.

However, one can see what you have downloaded in the Steam folder anyway.

Are probably the parents who shouldn't know what the child is playing…