Garrocha is a great way to test the schooling progress of you and your horse, and really fun. I watched some videos on YouTube, did a little research then went to the hardware store and bought a 13 foot pole. I was surprised after just a short time and a little caution, how easy it was. One reason maybe because I already ride with all my reins in one hand all the time.
One thing I really like about riding with the pole is it takes the focus off trying to ride perfect dressage movements and you just move with your horse as one. I have 3 very different horses and all had their own time of adjusting to the pole. My draft x Bella, in the picture above, instantly was fine! My Anglo Arab was a little spooked at first but her intelligence kicked in pretty fast and she settled after about 10 minutes. My Quarter Horse Cinder, took about 3 separate sessions ( one was at liberty ) to get her comfortable enough for me to be able to ride with the pole in walk, trot and canter.
If you like to try new things and experiment, I highly recommend it. Study it, practice on the ground first and then give it a go!