You are already over 1400 chess.com rapid rating, so I would imagine you already know there there is no "best" opening and you should similarly know that the "easiest" isn't always the better ideas.
I played e4 e5 with black for years (switched repertoire about a year ago) and there is so much variety there, so it really depends on what kinds of positions you like and your playstyle.
So, what is the easiest way for a new player to pass the opening stage as black in e4 e5?
What's best in the italian: giuoco piano, hungarian, paris, anti fried liver, two knights?
What's best in the spanish: Morphy, berlin, old steinitz?
What's best in the scotch game/gambit: schmidt/classical; haxo/dubo-reti?
What's best against the spanish and scotch four knights?
What's best against the ponziani?