Ruby, I speak Italian pretty well. I have Italian family and I lived in Rome for a while too. I would suggest that you could study to GCSE on your own but after that you need guidance. Read Italian literature and if you need someone Italian to email I can sort a cousin or something out for you, when you feel ready for that sort of level. For now make sure you know the three basic verb formation of Italian, work on the present and learn a new word and a new verb everyday. Then work on the past!
You can always spaz me any questions xx