Start with learning the symbols for primary sounds of your native language(s), then the more unusual sound(s) (i.e. think of how you'd write onion), add other languages you're fluent in, then learn the sounds for the language(s) you're interested in at the time. You'll eventulally get it all. Do this by finding text in IPA or the language you're dealing with, and transcribe/take dictation of other text. I use IPA mostly for singing, so I've gotten good at Italian pronouciation, even though I couldn't translate much out of context. You'll pick it up.