If you want long term cycles, learn McWhirter, learn Gann, learn Sepharial, learn George Bayer.
If you want shorter term cycles, use TS like fast cycles, and spectrum viewer.
The problem with cycles and TS is that you cannot approach forecasting with cycles in a static method. You must always apply and orb to your cycles and you must always be looking alternative waves.
Gann works, his methods and those of 100 years ago works. TS default settings don't work at forecasting Gann. But they WILL help you find cycles, or even confirm your cycle being valid or not through its periodogram.
You can't learn this overnight. SO, take it easy. Pick up a book on Gann, and start to work out each of his methods one by one. Then you will see how TS fits perfectly into this.
TS is not a black box. You must learn cycles and forecasting and then TS will fill many gaps and make many jobs easier.