Edit /etc/ssh/sshd_config:

vi /etc/ssh/sshd_config

Change:

PermitRootLogin yes

To:

PermitRootLogin no

Restart sshd:

systemctl restart sshd

Add new user:

useradd -d /home/<NEWUSER> -m <NEWUSER>

Change new user's password

passwd <NEWUSER>

Change default shell to bash:

chsh -s /bin/bash <NEWUSER>

Run visudo to add Full Sudo Privilege to the new user:

visudo

Add below to the end of the file:

<NEWUSER> ALL = NOPASSWD: ALL