How do I equip a weapon? (in New players)

Not to my minion, to my main dude.

Your main dude is made by your minion(s).
Example:
Main Name: The Fighting Duo
Minions that make up the Fighting Duo
-Mr. #1 (minion 1)
-Mr. #2 (minion 2)

You equip your weapons and armours to your minions to make your team stronger.