It's taken 20 years, starting with 200ft of grass, but with the advantage of 2 x 150 year old oak tree with preservation orders. Year 1 start digging up the lawn. rip out all the roses covered in blackspot. Buy a big green house. Year 2 Dig a pond. 2m by 5m, with a shallow end for birds bathing and frogs exiting, and a deep end for hibernation.
Propagate like mad, from seeds and cuttings, then start planting.
Feed a mix of bird seeds for differing types of birds. Make sure there are some shrubs for cover. Don't spray pesticides. Barrier methods (nets etc) and pheromone traps in the fruit trees. I adopt a mass slash it all down each spring , scatter seed around, and then give it a good looking at for most of the summer.
Despite doing it all the wrong way, we usually have more fruit than we know what to do with, plenty of veg, flowers for the house, and a grassy space for entertaining. It's not very tidy though, so if you suffer from OCD tidiness it's not for you.
Last year I took over next doors old dog run , churned up by 2 great danes. I'm just waiting for the new wild flower meadow to start flowering. This is to encourage more seed eaters, hoverflies and bats.