Hmm, the punctuation and writing are a little rough. Do we have a teen here, or perhaps English as a second/other language?
Abbie, I think I know what some of your questions are...
Photo: You can add a photo to your message board postings by editing your Spark Page and choosing a photo for "Profile Image".
Blog? Not sure if you wanted the diary sort of thing. On your Spark Page you can add a "Blog" which is like a diary, a stream of consciousness of what you're thinking or feeling today, to share with others.
I see you've got the weight tracker sorted.
You can track what you eat on your nutrition tracker. That's a button on the main page after logging in, in the first column.
Hope this helps you somewhat. :)