Good day!
After reading your intro, here is a Quick Installation Guide - Apache CloudStack's Documentation: https://docs.cloudstack.apache.org/en/latest/quickinstallationguide/qig.html.
To get access to CloudStack's web interface, merely point your browser to http://172.16.10.2:8080/client. The default username is 'admin', while the default password is 'password'. You should see a splash screen that allows you to choose several options for setting up CloudStack.