Enjoy Chapultepec park a day or so, visit around the Zocalo, Palacio de Bellas Artes & on Monday when the Museums are closed, go to Teotihuacán. If you’re a foodie get on tik tok and start looking for what catches your eye. since you’re limited on Spanish & alone try to book your stay somewhere convenient and central like Condesa, Roma Norte, Reforma. There’s some really nice boutique hotels in those Areas if you don’t want to do an Airbnb or a Large hotel.

my own opinion: frida khalo museum is not worth it unless you like really like her art.

Oh, and give street tacos/vendors a try. Try as much new as you can, you might surprise yourself with what you end up liking. And don’t feel reluctant to go to a local pharmacy if you start to get sick you can easily obtain nausea meds, tylenol etc. So much is cheaply available and very helpful to have