They’re ok, but よくない is usually when something is bad, like a business, when something is a bad habit or bad for you, like smoking, or maybe when replying to てもいい? questions.
For food, you’d probably prefer to use おいしい and うまい/まずい, imo.
I did see some examples with よくない, but they specified with 味.
姉 > 始
asdfghjkl bringing kanji out of my head I always do this. I remember only one little bit of it and mix them all up. I’ve been using LEXILOGOS to help with typing and finding the right kanji in a sea of ones I don’t know yet also isn’t so great.
Ah, you should install a Japanese keyboard, so that you write the sentence in Japanese, and it gives you the kanji. I know it might not help the kind of studying you want to do, but that’s how most people write.