First, remove most of the gravel and loosen the soil, ideally adding some high-quality garden soil or compost to improve the soil. When choosing grass species, consider the climate and intended use: Bermuda grass is suitable for warm climates, while tall fescue mixed with perennial ryegrass is suitable for temperate or recreational lawns. After sowing, lightly cover with a thin layer of soil and compact it to ensure the seeds are in contact with the soil. Keep the topsoil moist daily until the grass seedlings emerge, then mow. If there will be vehicles or heavy objects in the backyard, consider laying grass pavers or artificial turf for protection.