So, prior to posting it would be nice to see what your post actually looks like, once posted, specially if you are including links, images, tables.. so on.
Keep in mind that as a newbie you won't be able to some of the text formatting features (including images). You can lift some of these limitations by buying a
Copper rank.
Thank you. This was very helpful! I just bought copper rank. I dont want to load you up with my questions, but if by any chance you'd know the limitations on image posting size or any other limitations I would greatly appreciate it. The image I am trying to post is not going through, prob because of its size. I get an error message "invalid image". The image is hosted by an image site. I looked everywhere in "Help" can not find any guideline.
You have to use links that lead to the image file itself.
https://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Bitcoin_logo.svg/1280px-Bitcoin_logo.svg.png

You have 2.5MB of size limitation. If you have more questions, just ask.
TryNinja already explained it well enough. I suggest you to read this first
https://bitcointalk.org/index.php?topic=1689727.0You'll find many answers to your questions.