Can I install my own system?

The answer is simply Yes. You don't need any special equipment, although you can not guarantee perfect pictures without the use of a meter. You can purchase lots of books on this subject. 

The dish has to point towards the desired satellite(s). It can be mounted almost anywhere, providing that it has "line-of-sight". For Astra you need a clear view at 19 degrees East of South at an angle of about 25 to 27 degrees upwards from the horizon. Make sure that there are no trees or buildings blocking this line.