Hi Victoria248
You need to register your widget in your function file see the below link.
http://codex.wordpress.org/Widgetizing_Themes
and then you need to “call” the widget using the dynamic sidebar function reference see link below.
http://codex.wordpress.org/Function_Reference/dynamic_sidebar
Hope that helps!
Thanks for the reply Robert, I still can’t seem to get it to work though so I think I will try creating a child theme from one of the default themes instead (there’s quite a bit of other stuff still missing on the theme I added myself anyway and it all seems a bit complicated!) Thank you anyway though. Perhaps when I’ve learnt a bit more about WP themes/PHP I’ll try again!