This is a problem that's been plaguing me for years. I have been wanting to learn Korean, but I just can't get the past the first step: pronouncing it.
I can produce and hear aspirated consonants clearly. I still kinda struggle with the vowels, but that's more because I haven't put much effort into it. I just can't force myself to progress until I know how to pronounce those damned 'tense' consonants right. Problem is, nobody agrees on what they are. I've seen dozens of explanations online, ranging everwhere from them being faucalized, germinated, and even just differentiated by positional allophones.
What can I do? I don't see it as possible to learn this language. Not that its too hard (I have a natural knack for learning languages, I was once an upper intermediate in German, though I've grown rusty). Its that, how can you learn a language when its impossible for you to learn the first step. Nobody knows how to pronounce these right except native speakers! And they seem to think they're just germinated consonants, even though that's obviously not correct (well, aside for the fact that they do have a brief pause right before them, which makes me think of the germinated stops of Japanese). I can't learn something that nobody knows! What am I supposed to do?
Oh, and I've heard that the younger generations are collasping their consonants. I've noticed that they don't both to pronounce their lax or aspirated consonants right. Sometimes they're aspirated, sometimes not. Older people seem to be more consistent in this.
Yeah, I'm completely lost and have no idea what to do.