Installation steps have been posted on different pages to easily track the progress.
1. Download and Install Redhat 7.7 as VM - click here
2. Download 12c specific binaries - click here
3. Oracle 12c Database installation - click here
4. Weblogic 12c - Infrastructure Installation - click here
5. SOA 12c Installation - click here
6. OIM 12c Installation - click here
7. Run RCU for OIM and SOA - click here
8. Weblogic OIM SOA Domain Configuration - click here
9. Post Installation Steps - click here
10. SOA OIM Integration - click here