Sandra's place is located in a cool spot. When you exit the building, you can catch a pesero on periférico sur, which is like 5 pesos, to the nearest metro station. There should not be an issue getting around, do your research.
I'd recommend to tell this to the taxi, because for some reason most of them have issues getting there.
1. Viaducto hacia Periférico Norte
2. Dirección Ejército Nacional
3. Dar vuelta en U hacia Ejército Nacional
4. De regreso en periférico sur
5. Segunda calle a la derecha
The street San Isidro is the second street passing Ejército Nacional.
I'd also recommend to map out the museums by location, since traffic is not in our favor. The closest museum you can visit near Sandra's place is Museo Soumaya, then head toward the city center, Chapultepec, Coyoacán, and then Universitario aka UNAM.
The building security is legit, Julio and Fernando are great! They can help get you a taxi or walk you to get one. Do not hesitate to ask questions, they will be answered. Below the building there is an EXTRA store, similar to a small 7-Eleven, very convenient.
Quick Tip: Get a special permit to climb to the top of the Angel de Independencia. I didn't have time to do it but if you do, MAKE IT HAPPEN!Great for photography. Here's how to get one: La delegación Miguel Hidalgo issues permits to people, give a group leader name if there is a group. It's free to go up, they just need names, amount of people, and time. Be on time or you will not be able to go up.
Important: Buy the tickets online for Frida Khalo/Diego Rivera Anahuacalli Museum. They do need times, but when you get there it does not matter. Show them your e-ticket and you are good to go.
My favorite place in the city is el Castillo de Chapultepec. If you have a student ID you get in for free. The top floor toward the back of the castle holds a stained glass wall with five women. Take your time and soak in the art of stained glass inside this castle, so so beautiful.
I love Mexico City and I hope you love it too! :)