There are many ways to be involved at St Thomas's, from joining the choir or bellringers to helping out with gardening, hospitality, flower arranging and many others. There are also all sorts of groups that meet for prayer, Bible study and discussion. Have a look at the various pages under getting involved for more details. For groups, have a look at the calendar for descriptions and times.
If you're not sure about what might suit you, talk to one of the clergy, who will be happy to tell you about what goes on, and can put you in touch with the right person.