Posted: 15/11/2017 at 20:17
If this is a very new garden I advise you to wait for the first year to see what comes up, what you like what you don't and what needs help/taking out/encouragement. In the mean time, keep it weeded and the grass cut regularly in its growing season.
You do, however, need to deal with obvious problems immediately so tree seedlings like the oak and any sycamores need pulling before they get out of hand. The other thing I would do now is mulch that bed with as much garden compost or manure as you can get hold of. If there is no compost heap there already, go to the GC and buy the cheapest multi-purpose compost you can find and any bags of well-rotted manure they may have and layer it on Worms and other soil organisms will work it in for you over winter and any bulbs or perennials lurking below the surface will appreciate it. Do this after a good rainfall so you don't lock in dryness.
I would be tempted to cut back some of that ivy on the ground before it creeps all over the bed and then just keep the lawn swept of leaves. Next spring, after the worst f the frosts are over, take stock of what is starting to come thru, trim back any obvious dead or broken stems on shrubs and trees and give everything a good feed of pelleted chicken manure.
Use the winter to work out which way your garden faces, how much shade and sun it gets, what soil you have, how cold it gets, what features you want - eating area, kids' play, pond, pergola - and do a few rough sketches to work out how and where to place them. Think also about a budget and how much time you have each week to spend on the garden and then you can make good decisions about how you go on.