No no no! None of this "when I get photo-worthy" nonsense. This is all about learning! If you don't post and you don't ask... you won't learn so much.
Take advantage of the fact that you can post, ask for critique, and get free advice (I wish we had the internet and photography forums when I was starting.)
Promise not to melt when the critiques point out flaws... getting negative critique isn't going to kill you -- it's there to help you. You'll get better. Everybody's first images are rubbish. In the words of Henri Cartier-Bresson "Your first 10,000 images are your worst."
But two bits of advice:
1) Posts that only contain ONE shot tend to get more useful advice than posts that contain every shot a person took that day. It's tough to give a critique on two dozen images at the same time. When there's just one image, then our attention is fixed on that one image. Even if we gave detailed critique on two dozen images, it's not like you'd actually be able to remember everything in those critiques.... you'll have much better odds of remember what you can do to improve just ONE image.
2) It helps to post the shooting information (what ISO, f-stop, and shutter speed did you use, etc.) This is all contained in the image meta-data (EXIF data). But some photo programs give you the option to strip out that data. Don't strip it out... leave it in. Because often the exposure information data is helpful to a reviewer who can often spot why you ended up with a particular result.