How can one reconcile a person's outwardly beloved and appreciated image with their inner fear and hesitation to defend themselves or others when facing problems, and how can this cowardice be overcome?

Our advice to you is to consult specialists in psychological diseases, making sure to choose a physician who is upright in his religion, or to consult specialized websites such as Islamweb, Islam Today, Al-Muslim, or IslamOnline, as they may offer you beneficial treatments and guidance. You should also maintain the morning and evening adhkar (remembrances of Allah), as they contain supplications to Allah for securing one from frights and for safety from harms.