I'll start by addressing the minimum raise.
Raise for a purpose.
To add money to the pot or to put someone out of a hand.
Minimum raises don't serve either purpose.


Calling an all-in with AKo? Bad Idea.
It's a tiny pot, 50 chips, don't bother with it. Your getting horrible odds. Let him risk 1500 chips to win 50. Don't feed into him.