I would recommend looking around and finding a discarded broom, rake, shovel, mop, etc, handle and using that. make your first rips around the neighborhood to see how things work.  You can spend significant money later when you hav a bit more experience. The article referenced above will be  a great help.

If you wish, drill a hole near the top of your shovel handle and tie a loop of cord.  This will quite useful in many ways.  This is how I got started many years ago, and I eventually worked up to more elaborate rigs.Recently I have really been using my poles as I recover from hip replacement surgery.  

Trekking poles are quite useful, but it works out quite well to start cheap.  Although wooden poles weight more than the current graphite/aluminum wonder sticks, you are swinging the weight, not carrying it, so the difference is inconsequential


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