Since your question isn't really a question, it can't be answered.
However, I may have a few solutions to your problems.
You mentioned expensive embroidery floss. I have found that about 8m (8.7yds) of floss can be purchased for 35 cents at local crafting stores like Michaels.
You also mentioned being confused.
My advice would be to watch videos online or talk to someone who already knows how to make friendship bracelets.
The switch knot is a decorative lacy macrame/ hemp jewelry knot that helps you save on twine too. This tutorial shows you how to tie one with clear pictures and instructions.
A sliding knot is a wonderfully easy way to end off a leather, string, hemp, or corded necklace or bracelet. It looks neat and stylish, is a very practical closure, and is very easy to make.