Hey,
I can’t seem to open the panel. I’m using a droplet (DigitalOcean) with Ubuntu 18.04 LTS, and following this guide - https://websiteforstudents.com/install-kirby-cms-on-ubuntu-16-04-18-04-18-10-with-apache2-php-7-2-support/
I’m unable to find the panel in my root directories.
Oh, that is old documentation from Kirby 2 times.
What version of Kirby are you trying to set up?
In Kirby 3, the Panel folder is part of the Kirby folder, not a separate thingy.
I’m planning to use Kirby 3, but I’m having trouble setting it up with Ubuntu/Apache 2.
To install the Panel on a remote server, you have to allow this in your config, because as a security measure, by default creating the first account is only possible locally.
Does the frontend work, including subpages?
This is what shows up at the moment, going to http://159.203.17.62/kirby/
Since subpages are not working: Have you uploaded the .htaccess file that is necessary for URL Rewriting to work?
The second link behaves rather oddly ok, it’s an image 
Yea (lol) I took a screenshot.
Where is the .htaccess file located exactly in Kirby?
It’s in the main project folder, i.e. next to the index.php and the kirby and the other folders, see Starterkit structure:
(And don’t use PHP 7.2, it has reached eol and will not be compatible with the new Kirby 3.5 version to be released tomorrow).