The choice of distribution is often a personal or even ideological one, but do know that the Arch family is generally aimed at either sophisticated Linux users or people who like digging deep into documentation.
Still, welcome to the Linux world! Every soul switching from Windows is a win for everyone. We're glad to have you.
Having that written, I don't know if Manjaro changes it, but Arch's default NetworkManager connectivity check fetches ping.archlinux.org. You could consider changing this by creating/editing /etc/NetworkManager/conf.d/20-connectivity.conf with the contents from the wiki. Could also use an URL or yours and check for certain content, but that's up to you.