Help

Hi everyone ! I always wanted to Make a vidéo game and I have such a good idea but I basically don't know anything about making One... I especially have troubles to know how people find the PNG for their caracters, the animations, the obstacles, etc... Although I would'nt lie I basically don't really know how to do anything... I would understand if you don't want my hrlo because I'm litteraly a beginner that knows nothing about it...