Medellin, Colombia or Buenos Aires, Argentina: Deciding where to travel.

I’m trying to decide between Buenos Aires and Medellin for two-week trip in September.

I’m a 36 year old dude learning Spanish, and one of my biggest goals is to practice as much as possible while still having a trip that feels fun and relaxing. I’ll be working remotely some weekdays, so I’m looking for a place where I can settle into a routine a bit rather than just run through all the tourist attractions and travel around a lot.

Goal is to somewhat settle and see how I like "existing" in each place. I plan on moving out of the US when my son is an adult and off doing his own thing. I am traveling now to different places in South America and Europe to see how I like them.

I do love to socialize with people. Sitting in a bar or coffee shop and sparking up random conversations is my favorite thing to do...maybe less so when trying too in Spanish.

Reasons for Buenos Aires:

• European vibe from what I have seen.
• The novelty of traveling so far south seems exciting (weird reason I know)
• I’m very big into food culture (steak, cafés, wine bars, markets, etc.)
• I like the idea of “living there” for two weeks: working part of the day, walking a lot, eating well, going out at night, and practicing Spanish in real situations.

Reasons for Medellin:

• The mountains and greenery look amazing. I am a big time mountain person over beaches.
• It seems warmer and better climate.
• I’ve heard the spanish may be easier for a learner than Argentine spanish.
• I am a big coffee lover. It also seems easier to take day trips out of the city to different places.
• It might be easier to meet people casually and not feel so isolated.

My main concern with Buenos Aires is feeling lonely or socially isolated if I don’t structure the trip well. My main concern with Medellin is that I might be choosing it because it feels easier socially. I've heard why some guys travel there and that is not my goal, but I am not afraid to admit I would definitely fall for the flattery if any is given to me so this is another downside.

For people who have spent time in both:
Which would you choose for a two-week solo trip focused on spanish practice, food, walking, local-feeling experiences, social connection, and a better overall travel experience?

Also curious how difficult Buenos Aires Spanish is for someone still learning. Will people understand standard Spanish, and is the accent manageable after a few days?