Please ignore the awful drawing. I'm a scientist not an artist! DH and I would do all the work, but I'm wondering about how much you think it would cost in materials.
It's hard to tell without dimensions. You need to make a cut list with the dimensions of each piece, so you can accurately estimate how many 8 x 4 sheets you'll need.
What are you planning to build it out of? It's more expensive, but I'd recommend furniture grade plywood over MDF.
You can easily calculate how many feet of wood you would need--just be sure to add extra for all the mistakes. Then see how many sheets that would be and how many drawer sliding system things you would need.
That space for the bookshelf on the right looks like it would be really small.