Try doing it slowly, in parts. That way you could work on a particular part of the form at different speeds until you master it. Remember, your practicing, so it only makes sense for you to do it slowly until you get the hang of it. Then you can put it all together and try to do it a bit faster. If you try to practice to fast you could end up doing the technique wrong in favor of speed which is not the right way to train. Speed is important, yes, but technique should be priority no.1. So start slow then as you get used to it you can up the speed. Just make sure you fully understand the dynamics of each technique such as the proper application of a pak sao and tan sao etc. When I started practicing Siu Lim Tao, I separated it into two parts and practiced from there.
- Good luck and Happy Training!