I need an editor!

I've got wordplay. I've got basic science. I've got stupid ideas and clever rectifications for them.

But I screw up "probably" and "probable" way too often. So help me, that's just the simplest of errors I make.

I need either,
1. More practice writing.
2. An editor, or proofreader, or something along those lines.

Where the deuce are these writing challenges on this site located? And how do I find proofreaders? I'm really bad at this, and I'm willing to admit it.