The following is the universally acknowledged website for any and all general information regarding the requirements, application process, and expectations of medical schools through the Association of American Medical Colleges:
Academic Prerequisites for Medical School
This is a strong starting point as a resource for general information about medical school. There are multiple links through the site for additional information on more specific topics.
The following is a recent news article about students majoring in humanities applying to medical school:
Non-Science-Based Path to Medical School
The resource above is recent and carries relevance in tips to currently medical school applying humanities majors. It was published by a credible source, however, it is generally vague in information and further investigation into tips may be necessary.
The booklet shown here is one of the many offered study resources for MCAT preparation. It is strong in reviewing test-specific material and providing practical practice problems. However, the content can sometimes be confusing or intimidating in sheer bulk such that it is recommended to enroll in an MCAT course either virtually or in-person.
https://www.youtube.com/watch?v=okeHZOg0z3Q
The videos above review the importance of extracurricular details outside of academic prerequisites for a competitive medical school application. YouTube videos pertaining to applying to medical school can be helpful because of the insight from those having been through the process and the additional discussion boards offering more insight in response to video content. However, it is necessary to be cautious in validating the content based upon the creator by your own discretion.