As far as the difficulty of the pattern, adding the charms may be a little tricky at first, but no worries. There are a bunch of pictures included that show you how to attach the charms so they’ll face the right direction.
The download of this pattern allows you to make and sell any physical products, but NOT to sell or redistribute the pattern in any way.
I have some of these finished items for sale in my shop. You can see what I have for sale here – Finished Crocheted Jewelry.