My Friend Is Getting Ready for Medical School Applications

A friend of mine recently completed her undergraduate studies and decided to pursue medicine abroad. She has started preparing to apply to Caribbean medical school programs, but the process has raised several questions. She is gathering transcripts, recommendation letters, personal statements, and other application documents while also comparing different programs. She wants to understand the process before submitting anything and avoid missing an important requirement. If anyone has gone through a similar application journey, what part required the most preparation? Were there any steps you wish you had started earlier?