As an alternative to scattering seeds, which can be a bit hit-and-miss, might like to buy turf with the wild flowers already growing in it, such as "meadow mats" which can save a lot of time, getting perennials established.
I scattered some old carrot seed, I had lying around, and they turned out to make some surprisingly nice plants, if allowed to flower.
I aim to build as many habitats as space allows, even mini wetlands in half barrels etc, or maybe a stumpery of logs for a woodland glade, with ferns and woodland flowers