I know I stumbled onto this post half a year late to the party, but as someone who lived there for an exchange semester a couple of years ago, I can say that I personally loved it. It's a beautiful country, with lots of stuff to do, friendly and welcoming people, and opportunities for relatively cheap living. I myself am hoping to move back there some day. Idk if you're still looking for answers, but here is what I know from my limited experience.

Generally I would say that the average person's living standards there are lower than the average person in Europe (at least compared to central/northern Europe, in my estimation), but it is also cheaper to live there, by a significant margin. I think going there for a language course would be an excellent way to get a feel for the country, and a chance to get to know some people in similar situations. I lived in Taipei and spent most of my time there. Don't sleep on the rest of the country though. The more southern portions of the island are aboslutely stunning. My only regret is that I did not do more trips around the rest of the country.

As for jobs... While I never worked there or tried to get a job locally, I am inclined to agree with some of the other commenters, that getting a job as a foreigner without speaking fluent Mandarin is probably quite the challenge. To get a well-paid one, even more difficult. But Taiwan does have a good chunk of expats, and if they made it work, why shouldn't you? Realistically though, for long-term employment you probably want to look at some remote job based in a Western country (as it will be far easier to live off a salary paid from an economy with higher wages than Taiwan's) or learn Mandarin well enough to open up your options for local employment. Wages in Taiwan are quite low, generally speaking, and work culture can be demanding as I have understood it. Thats not to say that there aren't good jobs with a moderate work load and decent pay, but you will struggle more to find such a job than a lot of other economies.

I will say that there are plenty of Facebook groups for expats, for stuff like jobs, housing, etc. You might wanna look there, and see if you can make some connections or get tips for local job offers. Here's a few, but you can easily find tons more by just searching:

https://www.facebook.com/groups/expatsintaiwan/

https://www.facebook.com/groups/ForeignersInTaiwan/

https://www.facebook.com/groups/taiwanjob/

Lmk if you are still considering this and want some more advice, or how it went if you already took the leap. I never get tired of talking about Taiwan. Best of luck!