Whew! It's important to know when it's time to move on. I wish I learned that early on with the things I've gotten into. The good news is that if you decide to return to it, I'm sure the solution is within reach.
You asked about the text editor. Someone else mentioned that, but I think what was meant by it was the text field you're currently using in WP. Honestly, between that and any stand alone text editor (yes, like Notepad), they both would do you well, it's just a matter of maybe some additional features that such a tool can offer you to make coding a bit easier.
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