Hi and welcome to TAS! Not sure what you mean by not knowing what to say after uploading an image. The forum is used like any other in that it's a place to interact with other members and hopefully also a place where you can get help and advice if you should need it on any creative subject.
The name on your images was just too big. We are happy for people to have a watermark as we appreciate people want to protect their images but we ask that these be kept discreet and not be a url to a website (we know yours was not a url).
Each site will work slightly different but here on TAS we don't want viewers to feel that they are looking at adverts and is why we're pretty strict about not having sales pitches in descriptions and/or urls on images etc.
We are about to launch a selling section for those members that want it. This will have it's own set of rules and people who wish to use sales pitches and sell their products will be able to do so from this section. All being well, we will launch this on 1st Jan.
So in general, you can upload images to the gallery and/or use the forum but not necessarily at the same time. This is a community site and we hope that we can all learn from or be inspired by each other.