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The first thing that jumps out to me is that the parameter in vsftpd.conf should be
chroot_local_user=YES
instead of
chrootlocaluser=YES
This is an older tutorial (targeting Ubuntu 12.04) but the vsftpd configuration section should still cover what you’re looking to do. The configuration in that tutorial includes chrooted user accounts.
I should also point out that unless it’s absolutely necessary it’s not generally recommended to run an FTP service as it’s an insecure protocol. SFTP provides a much better, encrypted option for file transfers.