This is alright.
The message is simple and direct but how you went about saying it could be improved, made a little more poetic, even.
You'll get that with practice, coming up with creative ways to say things. For now try and work on some of your phrasing a little more? Instead of the whole "make the change yourself" you could come up with a metaphor for change and how it isn't always simple (or is simple, depending on how you feel). I find that catches peoples attention more.

But your head is in the right spot, people shouldn't be scared of changing the world for the 'better'. And people shouldn't hold back on doing what they feel is right, even if they're the only one going for it, others will join.

One last thing, "cuz" should be "because" or maaaaaybe " 'cause" if you're feeling rebelious.

Good work here, but I'd like to see more metaphors and imagery. 4/5.

jess ~