I can tell that you are a beginner rider. My advice to you is to relax and take your time until you get some experience under your belt. Focus on the whole picture and always down shift completely before you come to a complete stop so that you will be sure that you have first gear before taking off again. You can also practice shifting in neutral while sitting still and use both feet to balance yourself when stopping so that you don't wobble. Good luck to you and be really careful out there especially amongst traffic.
