Do you think it's a bad thing to listen to other accents if you want to focus on speaking with a specific accent?

It depends on how important it is for you to sound like a person from a specific place. Even if our approach will help you get clear pronunciation close to that of native speakers, it’s unlikely that you’ll get to be indistinguishable from a native speaker. Assuming that you are not a secret agent, sounding exactly like a native speaker doesn’t really have any practical applications anyway. So for the vast majority of people, listening to different accents is not an issue, and getting used to the different vocabulary and expressions is likely to help you understand the different varieties of Spanish that you are likely to be exposed to as a foreigner. If you have a strong connection to a particular country or are planning on living there for a long time, it could make sense to focus on acquiring the vocabulary and expressions used in that country. In that case, you can try getting most of your input from people from that country. If you are trying to learn a variety for which you can’t find enough speakers or content, we recommend just getting input in other varieties of Spanish. It's better to learn another variety of Spanish than getting stuck and not making progress because you can’t find materials in the accent that you want to learn. Regardless of which variety you listen to at the beginning, if you eventually start living in a Spanish-speaking country or make friends in the language, you’ll see that those experiences will have a much greater impact on the way you speak than anything else you did before. The people who will define the most the way you speak are your peers, the people you identify with, and the people you look up to, since they become part of your identity. We also answer this question in our video FAQ (with English subtitles):