Aroma can be a good starter deck, if jar and sweet marjoram is released.
Jar can' t be destroyed in battle, also marjoram protect your from plant monster from being targeted by card effect + free backrow search when summoned
But those cards are not here so aroma is a bad starter deck
Also, if sweet marjoram makes it to the game, you seriously think konami will give you easy and cheap access to her? Dude it's gonna be in a mainbox as UR best case scenario
Aroma is a trap for new players, a waste of gems really. Better spend that on a more capable deck. Note Aroma, regardless of power levels is actually really hard to play, a lot of decision making is required on what effects to activate, a new player is going to just do badly with it.