No language is ridiculously easy to learn, and no language is impossible to learn. Learning a language requires some effort, and your own background with languages can change everything when it comes to what’s easy and difficult.
That being said, for native English speakers, some languages are easier to learn than others.
In fact, Effective Language Learning’s list of the Foreign Service Institute’s rankings of how long it takes to learn different languages can be used to infer level of difficulty since in general, languages that take less time to learn can be considered “easier.”
In general, no surprise, it’s easier for English speakers to learn languages that are more similar to English in aspects like writing, pronunciation, grammar and other factors, and this often includes Romance languages. Therefore, languages like Spanish, French, Italian and Portuguese are usually relatively easy for English speakers to learn.
Languages less like English (such as Chinese, which makes extensive use of tone) are usually harder for English speakers to learn. However, much of what makes harder languages seem harder may be overcome by motivation and mindset, so don’t be discouraged from learning any language!