I wish I had known, don't you? All those things you know now - if you had known them before? I wish I'd known then what I know now.
"I didn't learn grammar in school, and I succeeded in University; now I teach writing!" I homeschooled my children without teaching grammar - until my youngest was struggling with spelling and we began The Good and The Beautiful. Sentence Diagramming! Now it all made sense! Don't get me wrong. I had some rudiments; I'd learned the basic parts of speech and intuited where to put commas. I learned as I went, but my writing could have excelled beyond my dreams - if only I'd known.