Do you have suggestions for Mandarin traditional content or resources?
I don't really have any good tips regarding content. But there is one thing I have mentioned before, Chinese (Traditional) on LingQ means exactly this - traditional characters: the Republic of China flag 🇹🇼 is misleading in my opinion, there is nothing specifically Taiwanese about LingQ (traditional), for example 注音符號 (Bopomofo) is not supported. Please be aware that there very few users on Chinese (Traditional), there are hardly any usable dictionaries, fewer and worse user generated meanings, a significantly smaller library especially below advanced 2, etc.
That's why I would recommend anyone to take advantage of the full LingQ library and use Simplified as well. Basically everything is better and easier over there. One point I'd like to mention: The user generated meanings. These were especially valuable to me early on. Using LingQ Traditional, these are often either non-existent or dubious (straight from Google Translate). If you really want to use Traditional extensively, I would recommend you use some kind of browser pop-up dictionary (e.g. https://github.com/cschiller/zhongwen).
Another point: The vast majority of content in LingQ's Chinese traditional is actually spoken 普通話, transcribed using traditional characters. A couple of podcasts and some Ted talks are pretty much the only courses in Taiwanese Mandarin. So if you are looking for spoken Taiwanese, you will have to import it anyways.
I'm not really learning Taiwanese Mandarin at the moment, so I don't have good resources to offer.
But in emergency, you can always use Youtube, here is an example:
Copy and paste this into your browser, replace the character 習 with your search term, ideally using traditional characters.
(I originally got this tip from the user iaing, but there are probably other ways to search YT as well)
You will of course still get a lot of 普通話 content, just with traditional characters in the subtitles, so you have to watch out. If you run this search every now and again you can definitely create a good library of content for yourself.