First of all, if you need aid figuring out what is in your garden, you can turn to the Open University iSpot website where you can find thousands of photos of birds, trees, and butterflies as well as social network with many users and share observations.
Second, you should start to identify where your passions lie and get involved, whether they are focused on an issue, an animal, or a particular place. Do some research and join a campaign that promotes your cause and you can help change the world that you live in. There are many conservation groups spread across the country that specialize in everything from seals, dragonflies, barn owls, and sharks.
If you need a cause to help, you can help protect bees by working to get neonicotinoid pesticides banned to halt the honeybee decline by signing the Soil Association petition. Those that want more information can find it at the Bumblebee Conservation Trust, which has built in a page informing local gardeners on how to attract bumblebees safely to their gardens.
Following this train of thought, you can create a wildlife friendly garden that will increase the amount of bugs, birds, and bees that stop by your garden. There are great articles that can help you increase the amount of wildlife in your garden found at both the Natural England website and the RSPB website.
Across the UK there are also plenty of 47 regional Wildlife Trusts that form one large voluntary organization that are all in need of your help and welcoming members.