On a slope in full sun the following grows well: the fastest to root the slope is the pennywort (Lysimachia nummularia, blooming in June-July with many yellow flowers) or a strawberry meadow (variety ‘Florika’ with many very tasty medium-sized fruits). You can also use golden strawberry (Waldsteinia ternata), which weaves a dense, absolutely low-maintenance carpet. The evergreen (Vinca minor) with blue flowers in spring would also be suitable for slope planting, but it is poisonous. The classic remains of course ivy. Here you can surely get many cuttings from friends and acquaintances. All these plants tolerate both sun and shade.
Basically, you can also plant the entire slope with so-called pioneer shrubs (such as willow, birch, etc. and small ornamental shrubs) and ground cover perennials such as cranesbill. They tolerate drought and at the same time green larger areas. Ground cover roses, such as the hardy variety ‘Bonica’ also hold up well on sloping terrain. The plants must all have the qualities to form roots quickly, that is, to find a foothold and cope with drought. In a good nursery and garden center, the experts can show you many plants with just these qualities.