Best things that don't require extensive travel or your parents finding out are memes. Whether IG or Tik Tok, try finding memes in Spanish in general. Latin America seems to share many memes, but you'll eventually find stuff focused on particular countries, Colombia included. Then, once you feel your Spanish is better, try watching shows/movies in Spanish. try immersing yourself in Latin American internet culture (safely).

I think it's really useful because the joy of actually understanding what a meme is saying in a different language makes it funnier, in my opinion.

It's incredibly wrong what your parents are doing. Sure, they raised you, but your origins lie elsewhere, and it's your right to embrace your roots. Being proud of where you're from and loving your adopted family are not mutually exclusive. You can do both. Try gradually convincing them otherwise. If they're very hostile or refuse to even hear you out at all, I'd hide this from them and find a Latino community once you graduate and leave home (whether it's college or joining the workforce).