Hard Shield

This shield is pretty cool!
But, the only issue I can't make it, it's the multires or displace with on the Data/Vertex Group and Texture. And it took me at least 6 hours to retry but I gave up and got wasted my time.
The beginner lesson through 12 lessons went well.
But at lessons 11 through 28 are too difficult to fix the issue.
Thank you mr Saravanan