Do you have suggestions for challenges?

I am pretty bored with normal chess and also have tried all variants already.

Does anyone have suggestions what to try like "win a game without losing a pawn" or "mate with three knights" or "win in under 20 moves" and so on for me to try?

I will do everything that is posted here!

Don't make it too hard for the start pls

(Edit: I meant from the standard starting positions additional rules)

Set up a random KNN vs. KP and win it as quickly as you can.
Set up a random KQ vs. KR and win it as quickly as you can.

Play a game against an engine at highest level and see how many moves you can last.

Umm @mechessman2000 and @tygxc I actually meant things I can do in a standard game, so additional rules that apply within a standard game. Sorry for not saying it clear enough.