Latest post from each category

Didn’t you already have a thread like this for 5 latest? If not, search for it as I recall it recently.

And, if you use that but replace 5 with 1…

Since you confessed in the other thread you are not a coder… be happy there is a plugin and use it.
No, it is not possible without a plugin for us because neither you nor I can write code 🙂

Define “too many”…
Some people use 20-30.