I would recommend an informal postbac... informal basically just means you put together some classes at your local CC and create DIY program for yourself... definitely do not exclusively pick easy courses as medical schools will see right through this... if you have any interests that you plan on bringing up in the personal statement, like music or crafts or something, take one or two easy classes that are related to that (med schools won't be able to criticize the low level of rigor since they are genuine interests), and then take 4-5, maybe more if needed, science courses of moderate difficulty. Don't go taking something super challenging, like physical chem, try courses like anatomy, physio, ecology, metabolic or structural, nutrition, neuroscience, cognitive science, etc...