I was disappointing by the local contractors for installation of the sprinkler system and decided to do it myself even if I don’t have any experience in water systems.
The electric part and OpenSprinkler was by far the easiest and most fun and rewarding. I went with RainBird for sprinklers , fittings and drip system (i have a mix of sprays and drip) and HDPE piping 1″/32mm and I got a free design of the plan by the company from where I bought the RainBird products.
It is fun and rewarding, make sure you do a lot of reading before. I can share a lot of links from where I read about irrigation systems.