After logging in to Oracle Cloud, you are in the "Get Started" tab, which has three blocks, Quickstarts, Launch Resources, and Start Exploring.
It is recommanded to start the trial from here with the build-in process. You can bulild a WordPress based blog, if you had experence in builgin up a website before. Or you can also try the Quickstart of "Deploy a hightly available web app with autoscaling". By following the step-by-step guidelines, you can finish the work simply.
You can launch resources accordingly, after you learned more experiences from Quickstarts. For exampe, Install the NGINX Web Server and Proxy
In this section, you can read some useful documentation for oparting and managing OCI.
Explore other labs on https://docs.oracle.com/learn or access more free learning content on the Oracle Learning YouTube channel. Additionally, visit https://education.oracle.com/learning-explorer to become an Oracle Learning Explorer.
After set up your first website service, you may be interest in adding some useful things, for example:
Let's Encrypt! nginx on Oracle Cloud Infrastructure Using Oracle Linux