First of all, don't double post. Use the edit button if you want to add something.
As to your question, I couldn't find any rombohedron tutorials, but it's just a 3x3 shape mod. Try looking up tutorials for other 3x3 shape mods (fisher cube, master pyramorphix, puzzles like that) to get an idea of how to solve them. It might also help if you pop out a few pieces to get an idea of which pieces on your cube are the edges, which are the corners, and which are the centers.