What do the blocks measure? Just because they are small doesn't make it hard to do.
The snail Trail pattern is really just following one piece after another around the square. Are the piecing areas numbered so you can follow each placement?
I would love to see a picture of the foundations. I like to do this type of work.
Just have fun with it and If you don't like it after trying it is no loss except for a few bits of material and some time.
Here is a pic of what I am working on right now. These are paper pieced and the square in a square 2.5" block are what I am using . There are also very small snail trail, flying geese and pineapple foundations in this stack.
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Have fun experimenting!
TIP: use a fine thread like ariufil.
peace