Yes, it certainly can be picked up on your own. I did it, so I'm sure, did most of the other guys. Watch some instructional YouTube videos. Some are sound, some aren't. Squeeky Clean Dave is very good. I have a very short one showing my technique (100 degree fan jets in action). Both of these are sound and well proven, fast, reliable techniques.can using the wfp be picked on my own or do I need to be trained by a time served windi?
You're aim initially should be quality. Only after you've nailed that down to an ultra reliable standard, should you aim for the speed. The temptation will be quality and speed
Fight the need for speed, quality, quality, quality, eventually you will build muscle memory and a sixth sense for what's happening with the pole, brush, water and dirt. The equipment becomes like an extension of your arms. The speed will come with you hardly noticing it.