Counting problems

Hi reader,
I have a confession. I don’t know how to count correctly.

Yes, I know my plain numbers いち、に、さん、し/よん、ご、ろく、しち/なな、はち、きゅう、じゅう…

But I still can’t remember the exceptions for counting days (日) and things (つ).

I’m doing okay with 一つ, 二つ, 三つ and 七つ.
But 四つ, 五つ, 六つ, 九つ and 十つ still boggle my mind.

There are so many irregularities!
And I should have looked up counting styles earlier…
Wago and Kango are not exceptions but two different couting styles.

Should have read these two articles on Tofugo sooner >.<
Tofugo: Counting in Japanese
Tofugo: Japanese Counters Guide