As above.
Other things
It's a very good idea to "live" with a garden for a year - to see where the sunny, sheltered or dank/drab spots are. Before you do anything major. And yes, trim that ivy offa them trees! Just snip all the way around at the bottom and it will die off. You'll need to take the ivy out ultimately.
Try and at least keep the garden in trim though - a garden needs regular attention and best to do that on an ongoing basis rather than getting overwhelmed with a huge job.
I like this website:
http://www.garden.ie/. It's Gerry Daly who is a regular radio contributor and really, really down to earth - if you'll pardon the pun!
Take some trips to the Botanic Gardens - I love the change of seasons and the different landscapes.
Take some time to look at the various garden programmes on TV = Gardeners World on BBC is very good for practical advice. Radio 4 on Sunday @2 for Gardeners Question Time ( Bunty from Bedfordshire and Wendy from Wandsworth ) is most entertaining and very informative.
Don't rush in to buying/planting expensive trees and shrubs - you'll have them for a long time and best to choose ones that you will love. I'm currently enjoying my laburnum tree in early bloom - the first thing I see coming down the stairs in the morning from the landing window. Sets me up for the day.
Make friends with older gardeners - as a rule they are generous with their time and their plants. My first garden was almost entirely planted up with slips, cuttings and baby plants from yogurt cartons courtesy of my best friends mam. Much to my OH's eye rolling irritation, I have continued her tradition of never refusing a cutting or a plant in distress and have a plastic greenhouse full of yogurt cartons packed with cuttings and patients
Finally - find a place for bird feeders - it is one of the greatest pleasures of gardening to simply sit and enjoy your surroundings to the sound of bird song. Mind you the 4.00 am Dawn Chorus is not always welcome directly outside my window!
Enjoy - I believe that gardening keeps you sane. At the end of a stressful day, when all you want to do is to rip somebody's head off , go out in to the garden and dig a hole. Best stress buster ever!
mf