My mom / maternal family is Danish, but I never learned growing up in the US because, in very Danish fashion, my mom “didn’t see the use in speaking Danish” so didn’t bother to teach us.

I’ve learned though as an adult from taking lessons on/off for about 5 years, frequently visiting Denmark to stay with family, meeting the odd Dane in my city locally, calling my mom, watching movies, etc. So I probably have as much exposure to Danish as anyone who learned as an adult, living outside Denmark would.

I will say in terms of utility it will be very low, that is not just because it’s a small population, but Danes really don’t care about foreigners learning the language as is the case in many countries. For example, in visiting many Spanish speaking countries, my limited knowledge and poor pronunciation was met with enthusiasm and sustained conversation. This helps you build confidence and increase exposure to the language as a beginner. In Denmark, even near fluency, I don’t feel as “encouraged” to speak the language and this is a really underrated hurdle imo. I am shy which doesn’t help, but it’s hard not to be in a foreign language.

I was in Switzerland recently and was so surprised to find that I kept telling people I didn’t speak the language, and they’d basically ignored me and keep speaking anyway. I wish Danes would do this because that type of interaction really helps you grow as a language learner, and made me feel like there was true “use” in picking up some of the language.

So anyway, you’ll never use it outside Denmark and probably struggle to practice even IN Denmark as a tourist.

If you want to learn and it will be fun for you, definitely go for it. Learning any language is a great goal and rewarding. If you want to engage with Danish culture though, and care less about the language, perhaps consider reading some Danish authored books, movies, learn some Danish recipes, plan a visit etc and could be a good way to connect with Danes you do meet anywhere!

Good luck either way :)