If you are convicted and want to lodge an appeal, you can appeal against either or both the conviction and the sentence. You must however bear in mind the time limits for filing the appeal documents, and consider carefully whether or not you have proper grounds for the appeal.
You should not proceed with an appeal without considering carefully in advance whether you have proper grounds for the appeal. There is a possibility that you may be worsen off. For example, if you appeal against the sentence, the higher court which hears the appeal may impose a heavier sentence if it takes the view that the original sentence is too lenient.
Hence, it is important that you consult your lawyer or seek Legal Aid before you decide whether or not to lodge or continue with your appeal.