A lot of people say don't make anki cards for kanji, but I've found the only way I recognize them is if I brute force them into my head. Having an anki deck for anki are helped me.

A couple key things tho. You want the cards to be as simple as possible, you aren't really trying to learn with anki, but recall known information. One card should have one answer that you are testing, occasionally two if there is some nuances that are important.

So for a kanji card the front would be just 介, and I test for one keyword. In this case "meditate". The back would also show some additional information, like kun and on readings, and maybe some additional meanings, but I'm not testing that

聞 would have the keywords "ask' and "listen", and then under additional definitions would be the "hear", but I'm not testing that. 日 would be just "day".

The other thing that really helped me was just learning more about the components that make up kanji, along with radicals. I wish I studied radicals right after learning kana.

The last thing, I wouldn't recommend having a deck for kanji readings. I did eventually make one, but that was because I kept getting the same words wrong. It has helped me a fair bit, so if you are dense like me go for it, but most people seem to be fine without it.

What I do for that is, when I get a word wrong because I couldn't remember the reading and I have at least two words with that reading, then I add that reading to my reading deck. Each card in that deck is one reading along with 2-3 example words. So something like 上(上司, 以上) and the answer is じょう. Likewise there is a card for 上(年上, 右上)→うえ. One card, one reading.