Nice for a first, the braiding seems great.
The first of such woven pouches tend to leave something to be desired, I have experienced that

. Make a couple more, no other way to improve.
Yarn breakage, do
not use knots, just unravel the ends a little and overlap them, maybe 5 centimeters, or better; what feels right, before you continue braiding. Just be a little careful, to keep them in place, and you will have an invisible joint.
When I had finnished my first sling with 16-strand
complicated braid, I thought I`n need a long break before my next. After a few days ideas for improvements began to pop up in my head. Within the week I cut new strands of yarn, just to have them ready when the day came. Next day I was well into the braiding.
timann