The best way to post screenshots is to upload them to a site like imgur. Once you have unploaded your picture, you can press this button: and paste the URL there. If the address doesn't contain a .png in the end, add that (so it would be https://somethingsomething.png), otherwise it won't work. Regarding your build, you probably missed the feedback (you see whether your build got accepted or not right after you logged on). I'll send it to you via discord.
