Dr. MartensEmbury unisex-adult Chelsea Boot

I have a high instep. That means I have raised areas on top of my feet that make cowboy boots an impossible fit. Will my feet fit into these boots?

What would be the correct size in these leather boots for a person like me. He usually wears size 12 in US numbering?

Are these the 2976?

Are these steel toes? If there not I'll get them. I don't like steel toe