Lots and lots of trench digging. You might want to get some help.
If you want to do it yourself, decide what brand of parts you want to use. Go online and follow their directions re mapping out your property. Provide this info to the company and they will plan the system, along with a parts list. Buy your parts. Rent a trencher. Install everything. Hook it into your plumbing. Install the controller. I like a rain detector feature. Test the system and correct spray patterns. Or hire the job out as it might be worthwhile.
A good video to watch for this DIY.. https://www.youtube.com/watch?v=qW19T_t5Hi4
Hope it helps!