It's a good time to start planning your attack and certainly worth a go! If there's not one all ready, start a compost heap. Start with the obvious......rip out the tangled bindweed, pull up the big weeds, create space around the shrubs.....lightly trim the shrubs/roses to get them less top heavy - dont be too fussy at this stage. You will now have an idea of what you have. Treat the lawn with a selective weedkiller soon, which will get rid of most of the weeds and treat the weed growth in the shrub beds with 'Roundup'. To effectively prune, you will need to identify the plants. Dont be put off by this, most gardens are planted with similar shrubs and friends/neighbours will be able to name most of them, get this done before the leaves drop in the autumn. Buy Dr. Hessayon's 'The Tree and Shrub Expert' from a local garden centre, which is an easy book to follow and from this you will gleen all the information you need re. naming, pruning and caring for your shrubs. You now have all Autumn and winter to tidy the beds. Dont dig too deep, rather chip up a couple of inches or so and mulch the surface with mushroom compost or similar. November-March is a good time to hard prune (not in freezing weather tho), dont trim evergreens too hard at this stage as they grow slower than most deciduous shrubs. Finally, buy 'The Lawn Expert' author above and in in March, topdress the lawn, overseed, wait for spring and enjoy your garden!