Anakagung,
To the best of my knowledge all the Hysys users can register at Aspentech and get an access to their <<knowledge base>>, which helps to solve a lot of your needs. Besides, there must be some Hysys operating manual as a group of .PDF files. This manual contents al lot of exercises for the typical plant operations. It may take the significant time to go through them but this’d be a good start. I'd also mention that ease in use of Hysys is highly dependant on your chemical engineering knowledge and working experience.
To set out a reliable hypothetical component you must be well aware of its termodynamic properties.
hope this helps,
Jeyx