自己表現は、簡単そうで意外と難しいと思います。

Meaning: expressing yourself seems easy enough, but it's surprisingly tricky

自己: self, self, yourself, own, oneself, identity, ego, treasury
表現: express, expression, describe, representation, presentation, expressive, represented, manifestation
は: a, the, is, am, are, will
簡単: easy, simple, easily, brief, straightforward, plain
そう: so, really, yes, right, that's right, i see, indeed, seeming
で: in, at, on, with, by, over, through
意外と: surprisingly, unexpectedly, strangely
難しい: difficult, hard, challenging, tricky, tough, complicated
と: and, with, if
思い: mind, thought, thoughts, heart, love, hope, feelings, feeling, desire, emotion
ます: will, to be, i will, to make, to do, to have