useradd & adduser

https://www.tecmint.com/add-users-in-linux/

useradd username

also creates user & home dir (better use this command)
adduser username

To grant sudo privileges to a user type (as root user):
usermod -a -G sudo username

Change user
su - username

Open Sudoers file ( /etc/sudoers.d/ )
sudo visudo

Set no sudo passwords in sudoers.d (at end of file)
username ALL=(ALL) NOPASSWD: ALL

As a regular user with sudo privileges, you can delete a user using this syntax:
sudo deluser --remove-home username