Questions about flying through Mexico City airport
I am traveling to Cancun from San Francisco with an hour and 25 minute layover in Mexico City. This is my first trip to Mexico, I'm traveling alone, and the more reviews and comments I read the more terrified I am of making this trip! I hope someone can answer these questions with straight answers and maybe some advice, so here goes:
1. Since my Aeromexico flight from SF to Cancun is an international flight, do I have to go through customs in Mexico City or in Cancun? And do I have to pick-up my bags in Mexico City and then re-check them for the flight to Cancun? (This may seem obvious, but I'd rather look like a fool with the question than look like a fool at the airport because I missed my connection)
2. In Mexico City, is it difficult to get from the terminals for arriving international flights to the terminals for departing domestic flights? Is an hour and 25 minute layover enough time or should I run?
3. Does anyone have any suggestions or tips about how to navigate from my arriving flight to my departing flight? For example, how will I know what gate to go to? Are there particular signs that I should look for?
Thanks so much for anyone who's willing to offer some help!