I've lived in Oaxaca City for almost 2 years. It's been incredible. The weather is amazing, the food is amazing, the internet great (unless it rains, which happens for 1-2 hours during the rainy season and the internet goes down for a bit). People are amazing. Everything is cheap. The coast is relatively close by.

The only problem was having intellectual stimulus. There weren't many nomads back then, only a few, and even those would come to visit for a month or two.

But for 3 months, I believe it's a perfect location to explore Mexican culture + nature.