You can get by on English but I'd suggest learning Spanish. You will get so much more out of living in a Latin country by knowing Spanish.
I have family that's Latin-mixed and took the same Spanish classes as every other American in school. You think you forget that stuff until you live somewhere, where it's spoken every day. It will all come back and after a while, you'll be able to defend yourself in a conversation with ease. And more importantly, understand others.
Do Colombians like gringos?
Colombians are cool if you're cool. If you have some sort of personality disorder, suggest you get help to fix yourself or go to rural parts to be by yourself to be honest.
I lived in Colombia 8 months (from end of 2021 and into 2022) and had a great time. Bogota to Villavicencio.
In Colombia you do need to have a little street wits and I'd suggest being a litle confindent in yourself.
I had 0 problems and I went to their worst areas, in the night time.
I love it . I will definitely buy property in Colombia. #2 most bio-diverse country in the world and the food.. especially the fruit and veggies are AMAZING!
Cost of living is super low.
If you guys need help. I can do a Q&A on Colombia or Dominican Republic and share places to stay , things to do, ways to get your money with a little less fees, etc.