It is never about good and evil, only about what works and what doesn’t. Contributing towards others wellbeing above your own will inevitably hurt the latter, unless you are so unshakeably well established within yourself that nothing can ever even scratch you. At the same time to even be capable to improve wellbeing of others you need your own wellbeing taken care of
And yes, wellbeing does not mean consuming more and of higher quality than someone else, it means being well
It is the best course of action, and it is my wish that your efforts bear fruit no matter what life will throw at you