Hey there NebeL36:
My first words of advice would be since you are interested in the program, what is your personal interest in medicine and how did you come to that decision? This is a crucial aspect to not just the WF post bacc but any medical program in general. Also, i would definitely say that if you are not involved in a medically related job/ volunteering experience then it would serve you well to get involved with one. I am not just saying shadow a doctor for a few hours for just 1 day. medicine is a constantly changing field and experience with a hospital, doctors office etc. over a long period shows your dedication and knowledge of the medical field and its demanding nature.
I personally worked as a medical scribe in an ER for 25 hours/wk for a year, so i def saw medicine in action. Maybe doing something like this would be beneficial to you.
Also, since the program is designed "for increasing URM in medicine" i would show the adcom that you are interested in medicine for helping underserved populations. This i wrote about in my essay and should show from your extracurricular activities. For example you could volunteer at an underserved medical clinic ( i did) or do anything that shows your dedication to help those who are less fortunate.
Logistically, your GPA is fine for the program and as long as you get a 21 on your MCAT (at least 7's in each section), than you have a solid chance for an interview. Remember that the program is EXTREMELY competitive, not just academic- wise but in terms of the people that they accept with regards to motivation, experiences, determination, compassion etc...
I hope that this helps and remember that your essay is EXTREMELY important, take some some time to make it the best thing you have written and wow them there! Good luck and all the best.
Peace and God Bless