Learning Adobe Illustrate #1 - Facets (crystals)

I want to start working on vector graphic with illustrate, I watched a few guides for absolute begginers and then I moved on to something quite easy to make (atleast I thought it should be easy and then I've spend like 3 hours with 20min tutorial)
let me know what you think

Artboard 2.png
Artboard 1.png

Tutorial I was working with (really check it out, it looks 10x better than mine ;p ) :

H2
H3
H4
3 columns
2 columns
1 column
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