So you have created your own droplet and created a new user but your terminal autocomplete doesn’t work.
Here’s a quick solution for you.

First, login using a sudoer account and run the command.

# tip: remember the user to created from running sudo adduser imTheNewUser
# tip : make sure the user you used to login into the system is a sudoer 
sudo -u imTheNewUser -s /bin/bash

Type in your root password. And exit out of your root account.

Login to your user