Yeah i was in Sao Paulo in January for a few days as well, it was nice. I liked the street and building art, but did not get many pictures because the locals i talked to said someone would snatch my phone. I stayed mostly to Jardins, Jardim Paulista, Pinheiros, Liberdade, Tatuape and Parque Ibirapuera while i was there and it was nice. I went to some of the museums in the park which were nice, including Museu Afro Brazil. It was relatively cheap to eat and drink out there, which sucks since it is not for the locals. I can not expand past that since most of my activities there consisted of bars, clubs, and other things not family friendly.
I do want to go back out there and hang out with some of the people i met there, that is not happening anytime soon. I do not know about Colombia but Brazil is the last place i would want to go to with Covid going crazy over there.