Please help or give advice!

I think the most important piece of advice would be: cut yourself some slack! ^^ It’s a big switch for your brain to try and deal with a language that is so very different. It really does get easier if you stick to it, and allow your brain time to adjust to something to new. Your brain has to learn how to learn Japanese.

Like some others have mentioned, heavily leaning into the WK mnemonics was the only way I could make any progress when starting out. I also experienced that things go easier over time. It also felt like my brain flipped a switch over time, making it easier to retain these “foreign” sounds.

@tahubulat already mentioned it a bit, and there is a script that injects that kind of information into your WK reviews. If you’re planning to commit to WK, I would advise installing it from the get-go. If you use it, you will start seeing some patterns on how certain radicals being in a certain position within a kanji tend to yield the same on’yomi. It really helps memorization.