Inspiration can be taken from nearly any source. Two impressions combined and sparked my imagination: triangular pencil-case of my kids and tutorial video seen lately on topic of simple flat pouch with one-piece construction. Let me be clear, I like promotion of DIY skills. But newcomers must be encouraged to evolve, to gain an advance. So even first pouch should be simple as easy, not simple as stupid.
My take on simple sewing projects – below.
Let’s draw and cut triangular bag with seam allowances.
Parts can be enumerated from top to bottom as 1, 2, 3 and 4. See, part 1 combined with 4 is equal to part 3.
First, prepare small details. Inner back side loop surface (bright green), front loop spot (olive green), DTMF attachments on back side for waist/shoulder straps.
Sew zipper in any way you like.
Make side seams (long) first, and top seams (short) after them.
Fabric edges can be burned with lighter, no extreme need to bind them with grosgrain ribbon. Suddenly bag is ready, time to turn it out.
Perhaps best usage for this bag/pouch is wearing it around waist or cross-body.
When you think and devise your very own pattern, it should be easier to draw full part 4, equal to part 3.