How do I get this to be less messy?

Nesa • Mommy to a 15 yr old boy, a 2 yr old boy, a 1yr old boy and 1 angel baby girl lost at 4 days old to HLHS. Healing from a huge loss...Due 8/30/21

Practicing fish tails. Front looks good but the back is a hot mess and by the end of the day its sticking out everywhere? Tips? Tricks? TIA!!

First pic is the front, second pic is the back of the braid