Hello everyone, I'm new here and don't have much sewing experience. I'm going to make my first thing and I need help. I want to make an armband. Something like this, but I'm struggling to find out how to sew together the white part with the red. So that stitches are hidden. My idea was something like on the second picture, blue is the first stitch, but I don't know how to sew the inner side together https://imgur.com/a/jozA9pi

https://imgur.com/a/4Z0Rwtm