I am currently a high school senior in Miami and I have been accepted to both UF and UM as an undergraduate for Mechanical Engineering. The deadline to commit to a school is May 1st and I am still confused on which university would best for me.
UM is near my home, allowing me to live there with my parents, unlike in UF. For both universities, I will be more or less be paying the same amount due to grants and scholarships they have both provided me (so cost is currently not my concern). I am also graduating with my AA from high school and I heard that UF will accept more credits than UM (Idk for sure though). I also heard that Miami and UM have more internship opportunities because of its location in a big city (although I do not know anything about internship opportunities at UF). UM has its prestigious status and UF is well-known as well. My issue is the following: Which university will bring about the best opportunity for me to prosper after the four years, especially for those who are becoming engineers?
Yes I mean University of Miami
You need to ask each of them separately for an estimate of the AA credits that will be accepted toward your degree. They can’t tell you exactly how many until you have enrolled this fall, but they should be able to give you an estimate now like they would for a transfer student.
It also is perfectly OK for you to ask the Mech E department and the career center at each university where their students find internships and jobs.
It is likely that classes this fall will end up being online. Which place would you rather be studying at from the comfort of your dining room table or bedroom? When the pandemic is under control enough for live on-site classes, where would you rather be? And yes, it really truly is OK to want to be closer to home, just like it is really truly OK to want to be farther from home. 
You can use LinkedIn to get a sense of where ME’s from UF and UM work, etc. Search for the university and then select the Alumni tab. Then search on engineering or mechanical engineering.
UF also publishes it’s graduation survey results. You can select Mechanical Engineering and see info like starting salaries, internships, etc.
https://career.ufl.edu/gain-experience/student-outcomes/
The website is down this morning, but you can look at the previous year’s data…
https://career.ufl.edu/2016-2017-student-outcomes/
UM has a much smaller program. You’ll be in smaller engineering classes (a plus), but you will not have the same number of options (classes, design teams, etc.) that you would find at UF.
You can view the UF career fair participants to get a sense of who recruits at UF (LinkedIn also works).
https://ufl-csm.symplicity.com/events/students.php?mode=list&cf=CSFall18
Good luck!