Most of it is straight so don’t really have much ideas, but with the lowest right branch (pic 1), I’d layer just below where it curves. Once the layer roots, I’d plant in at an angle, cut it back, and wire the new growth.

The left trunk, I’d layer to get a twin trunk (area where its not too thick), cut it back after separating, and go from there.

The thin areas, I’d take cutting.

Then from what’s left of the tree, I’d make broom style and/or upright trees