@Emmylouber I would suggest doing a wingspans length for your strings. This is what I did for my and it worked out great and had a little bit of left over thread.
@Paryand try knotting row by row instead of segment knotting? Some of my segment knotted bracelets are lumpy on the sides. But also keep the same tension throughout the bracelet…. I’ve never done this pattern so I can’t tell you my experience on this….. Hope this helps!