don’t worry, it just takes lots of practice speaking the language outloud. it will come with time. when I speak quickly I still say ‘isch’, but if i concentrate and slow down a little, I can say it perfectly. It’s not so much from your throat, like native english speakers think! it’s got to do with your tongue positioning and properly pushing the air through. :) here’s what I do: make sure the sides of your tongue are pushed against your TOP molars, then bite a little with bottom molars, as if you are pinning the sides of the tongue down to keep it immobile. then try saying the words, ich, nicht, dich, mich. keeping the air flow moving forward. german language requires more muscle toning than english, and i promise it just takes time and practice. and if you dont master it, people just find your accent cute! there’s nothing wrong with having an accent, infact sometimes it’s a great way to meet boys. :P hope this helped!