Can not find Civicrm.settings.php
Normally you don't install from github you would get it from https://civicrm.org/download and then follow the instructions at https://docs.civicrm.org/sysadmin/en/latest/install/drupal7

If you are looking to do development it might be easiest to start here instead: https://docs.civicrm.org/dev/en/latest/tools/buildkit/