Your extra-thin trowel is useful for planting bulbs and digging out weeds with long taproots like dandelions!

If you can get hold of tomato plants, put them in the first bit of soil that's ready. They need a longer season than quicker-growing things like salads. Dill grows easily from seed and looks pretty. You could interplant with something like cosmos seeds for flowers. Calendula also grows easily and quickly from seed, as do agrostemma, nigella and eschscholzia. All good for beginners :)