Probably not. As soon as you change something, someone else with more seniority will change it back.
_____________________________________________
So how long you’ve been a member at Wikipedia matters in terms of what you can do to what?
You can do anything unless an article is locked or otherwise disabled, last I remember. If you don't sign up before making edits, then everyone else who has signed up can see your IP address. Otherwise, I believe your IP address is hidden. At least, that's how it used to be.