I wouldn't plough it, just get someone to put a harrow over it and direct drill or over sow with grass seed. That way the land will not need so long to settle and also any native local grasses will already be in the seed bed. If you do this in September you will have some grass by April/ May and I would just roll , mow or put a few sheep on it to pack it down some more. An acre seems a lot but once you put your paths acess in etc , muckheap or compost bins it will not be that big. Have fun, I love the planning.