If you want a serious answer, no, I don't think it's worth it.

Learning Esperanto means you learn one of the very first attempts to make a universal language from scratch (first doesn't mean good), a very eurocentric language as its critics have put it, and you basically sell your soul to the Akademio, the entity regulating Esperanto. I don't see anything to gain from that.

The fact that communist countries have a history with it and celebrate it seems to be for different reasons. For example, the USSR once tried to use Esperanto because for them it was better than using English, which was the language the USA were pushing forward, a country that used capitalism as its model. Not to mention that at the time, there wasn't wider knowledge of which languages were better than Esperanto, the popular "universal language"; it's no wonder things happened this way.

I'm not entirely sure of the scientific backing of that claim, but I heard that the current way of learning languages by studying them made it unnecessarily hard. On the contrary learning languages by immersing yourself like a child would could actually be the best way to learn languages.

If that's true then Esperanto would actually be a harder language to learn since you can't really fully immerse yourself, there are no native speaking communities or anything.

Also the reflection of ancient culture in languages is a beautiful thing to discover, an aspect that is absent from Esperanto

Still, could be practical if a lot of people knew it, and would still be the easiest if language immersion turned out to be not as good as its defenders say

Iirc, back when I was interested in learning Esperanto, one of the criticisms I saw was that it's very Eurocentric in its design. It strives to be a "universal language" but is very obviously rooted in Romance language. However, conversely, I remember seeing the argument that learning Esperanto for a second language is comparable to learning the recorder for music: it's not so much that you will use the skill in Esperanto, but more you will use the skill in language-learning to more easily learn other languages.

Personally, I think Esperanto is pretty neat, especially conceptually, but probably not too practical unless you're involved in the Esperanto movement and committed to it. I believe there are people raised to speak it natively, and there is a sizable international community. It could still catch on, given the right spotlight.

There are in fact large Esperanto communities, but they are very segregated from conlanging communities, because Esperanto is one of the most hated conlangs. Esperanto was very overhyped when it first came out. Because it has many haters and it's overall a pretty mid conlang , I wouldn't recommend learning it. If you want to be understood in many places, you should rather learn a popular natural language like Mandarin. If you want to be in the conlang community, then learn toki pona.

Maybe this is a little bit of a cop-out, but I say if you want to learn a language, whether it has a massive community of speakers, small isolated enclaves of speakers, or none at all, you should go ahead and learn it. There's no real downside unless you factor in the opportunity cost, that being you could have learned another, more "useful" language in the meantime, but would you have done so? Probably not, right? So go ahead and do whatever pleases.

Concerning lingua universalis, I'm not sure if something like that is possible or even desirable. And I'm not sure hand-wringing over "gendered language" or Eurocentricity are worth your trouble either. These are incidental aspects of language, constructed or not. Just my two cents.

What a coincidence! Yesterday I read about L. Zamenhof, the creator of Esperanto, in Wrocław at an exhibition billboard at the city market.

i think it's fascinating, you can use it as some kind of secret code too!

saluton! mi estas lerni esperanto, mi volas lerni

Esperanto has a vibrant community of people still, and meetups happen globally. Speaking it opens up tons of cliques, clubs and friend groups, like pen pals, events, concerts, or even camping/work and travel. It's definitely worth it.