You don't want weeds among your crops, because they're competing for the soil nutrients, hence the mulch, but I tend to think of a lawn as an albatross. Better to get rid of it in favor of wood chips, gravel, pre-made stepping stones, another pretty terrace like your trash bin area you showed, a picnic table, birdbath, whatever. Lawns take a lot of water and drive people crazy. In my aunt's yard, wherever I saw a patch that didn't want to be lawn anymore, I'd dig it up, surround it with rocks, plant something in it. That's how we got a meyer lemon that went nuts and produced fruit the first year, though it was already a nursery start when I brought it home. The terrain tells you what it wants to be. My uncle was good at listening to the land that way. He had a spot that was always muddy, maybe downhill from the neighbor or for whatever reason, and part sun part shade. He built a brick planter around it, added more soil, and planted spearmint, peppermint and lemon balm in it, all which loved growing in that spot.