Wow Spewy - what an exciting project! The kind of scenario most gardeners would fall over themselves getting their teeth into!
Some brilliant advice on her too, from people much more experienced thatn me - will only add my bit by saying that waiting is the key - you'll be amazed what pops up or comes alive over the next few weeks, which you thought was a goner
As you start identifying, you can then get a feel for what needs pruning and when.
Mature shrubs are a great starting point for a novice gardener, as they can be tough old plants which can take the odd cutter-happy episode without keeling over
Please do keep posting as leaves emerge, so we all can help you more!