Consult a scholar or an imam. From the looks of it you seem to be suffering from waswas (devils whispers). Increase your dhikr and adhkar and read more Quran to combat this. I do recommend speaking with your parents first as they may be able to help you. May Allah ease your condition
It depends. If you are drawing a human figure in order to pray to it, then it is indeed taboo as Islam is strongly against icons. However, doing it as a hobby is perfectly acceptable if you have innocuous intentions.