For the most part, asking and answering questions is like on any other forum. The forum is based on the open source phpBB system. And no, I'm not making a fart noise.
The FAQ section is quite good at answering questions. It's the second button from the left just under the header.
To make custom stuff, there is what is known as BBCode. You don't really need to know how to code to use it. There are buttons above every post. You just need to make sure what you want to effect is between the brackets.
For instance if you want to italicize something. you put the word italicize between the [*i][*/i] brackets like this: [*i]italicize[*/i]. (From now on if ignore the *s. They are there so you can see the code.) Or you can just highlight the text and click the italicize button.
Posting pictures is a little bit of a problem because you have to link to a picture online. We currently can't upload pictures directly. The workaround is to get a free image hosting site like Photo Bucket. You then upload your picture to that site and link to the picture here.