Even if you aren’t familiar with the interface, anyone can join the wp-docs mailing list and let the other volunteers know that you want to contribute an article and we’ll take it from there. Or just start a user page and paste in the information (please let us know on the mailing list) and we’ll come in and fix it all up for you and give it a nice “home” on the Codex.
It is actually much easier than you imagine. There isn’t any HTML or much to learn. Just write it out with some section titles and we can do the rest. We have a nice group of editors who just edit and not contribute, so they are always looking for new material to fix up. And new editors to help them.
We have a lot of holes in the documentation that need filling, and we’re looking for help, so if you are interested, please volunteer. And if you are nervous or intimidated, we do hand holding on the IRC Chat for #wp-docs. ??