Natalia N. answered 04/16/19
Biological Sciences BS, Master in Ecology here to help!
Personally speaking, as a Portuguese speaker i think Italian is easier to learn than Spanish, maybe it is the same the other way around as well. Try one week each one of those in free apps to decide. There are some Italian dialects similar in sound to Spanish. Also try thinking of some future utility for that. In US, learning French would be more useful, however if you intend on travelling some day to Brazil, go for Portuguese.