I hate that copics are so expensive. I need more blues and greens but just can't afford it. I like your tutorial. I feel a bit better after reading this. I get nervous putting dark colors down first but that's what I've always been told to do... so I just went light to dark in secret *sssssh* Nice to know I'm not the only one. Tutorial is so simple but SO effective. Wonderful! This is great reference to get started. It should come as an insert with any pack of Copics you get.
Prismacolors are still effective- although not as awesome- if you have those. I've found they can substitute pretty well in some cases for Copics colors you don't have.
If you put down your darkest colors first, then your stuck with that color. If you go with your lightest colors you can incrementally alter the shade until you get the exact one you want. You also run the risk of discoloring your light nibs (the marker part) by trying to blend too dark. Everyone has their own way, but it just seems like common sense to me. Glad you liked it!
I just find it more challenging to blend with light colours first, it looks like harder cell-shading so I just try to be careful with where I blend around and keep certain areas white, rarely ever have problems...
Copics are unfortunately very expensive. Usually ranging anywhere from $5.25-$7.00 per marker, depending on where you live. I recommend buying them at a local craft/art store if you can. Online shipping can tack on a lot.
You can also combined them with prismacolor markers- which are less expensive until you flesh out your collection. Take a look at the smaller sets and try to figure which combination of colors would best suit what you like to draw!