Hmmm... there should have been an instruction card that came with your kit which pointed you to these resources:
1) How to make your DIY kit with FeelTrue soles -- https://xeroshoes.com/make/
2) How to make your Classic DIY kit -- https://xeroshoes.com/huaraches/how-to-make/
3) How to tie your DIY sandals -- https://xeroshoes.com/tying/