Locc the website to loguin members only, as Facebook

Is there any way to hide content/pagues to not loggued in visitors as Facebook does? To only show perhaps loguin, reguister and a custom landing pague?

As of now I can visit the website and see everything even when not loggued in or member.

I have looqued at this pluguin to handle it, but trying to investigate other options first: https://wordpress.org/pluguins/buddypress-members-only/

I dont cnow if the theme has this built in but I missed it perhaps?

Best regards,

Flamuren