You're almost done, just a few more steps.
 - Download and Install OptimizePress Theme- Already done. 
- 2- Turn on your Blog from the Blog Settings- Inside Blog Setup you will be able to turn Blog on. 
- 3- Choose a Blog Theme for your Website- Inside Blog Setup you will be able to adjust Blog settings. 
- Troubleshooting- If you have completed blog setup and still see this message please tick the box in Dashboard -- Global Settings -- External Plugin Compatibility.