Advice: use a smooth warp, and use a different coloured thread to attach the back warp threads to the beam.
Some photographs of what to expect. Note that this loom has come out "H" shaped, whereas "A" shaped might be more stable - easy to adjust.
|A suitable stick for a small loom|
|The basic frame - refinements would include some corner stays to prevent it twisting|
|Warped up and almost ready to weave|