You can't plant much right now. I'd sow seeds of a green manure, such as red clover, now, which will stop the nutrients leaching from the soil and add plenty of nitrogen, phosphates and potassium too (essential for healthy plant growth). If you let the clocver flower before digging it into the soil, you'll provide plenty of flowers for bees, which will keep coming back to pollinate your crops. In september you can plant onions and garlic, and you could try sowing broad beans in autumn too. Good luck, Kate