If you are feeling more confident with your performing then why not join a choir, performing arts group or Opera Group?
Here are some links for you:
Musical Theatre and Opera
World and community choirs
Classical and Church Choirs
New Gospel Choir in Derry Hill Primary school near Calne:
Joining a group is really good way to make friends and share music making with others. It will also increase your confidence. Some choirs require good sight reading or at least the ability to learn music quickly. If you are not too confident or just want a more relaxed experience then try a community choir first. These are lots of fun and make little demand on other skills.