Can I have more than one WordPress instance installed?

Yes, you can serve multiple WordPress instances from a single Droplet.

To install multiple WordPress instances on your Droplet, you first need to configure your Apache virtual hosts to be ready to accept information about multiple domains.

Once you’ve configured Apache for multiple hosts, use WordPress’s standard installation to install a different instance of WordPress in each of the separate folders (in the /var/www directory) for each of your websites.

Apps do not have static IP addresses so you cannot point an A record at an app.
Use Punycode to add a non-ASCII domain name to DigitalOcean.
We have guides to help you migrate your data from your previous provider.