I did mine myself mate, 1.2m dish fully motorised, without any previous experience.
You need a decent pole (scaffold) and mount, it has to have a goodline of site to the south and be bang on straight.
Once the dish is attached and facing true south, its fairly simple to adjust to see the full arc of satellite.
Dont know if you know the place but satellite superstore in Rowlands gill has plenty of info on their site.
Ive also done a mates, smaller dish, so can help give pointer where needed if you wish mate