I think Marie’s idea of doing volunteer work is very good, whether you’re starting out or not, and I thought I’d add a few organisations to the ones that she mentions (Online UN volunteering services and Translators without Borders).
Oxfam (contact Leisa MacLellan on lmaclellanAToxfamDOTorgDOTuk.
Prisoners abroad (contact Laura Bevan on infoATprisonersabroadDOTorgDOTuk)
EHRAC Translations (contact Tina Devadasan on v.devadasanATlondonmetDOTacDOTuk).