Hi Torg, and welcome to the guild!
There are plenty of parchment tutorials in the tutorial section, or if you just want to grab a parchment texture, have a look at the mapping elements section - there are a few there.
I've uploaded your map to the site so it appears as a thumbnail (this means that if people want to see it full size they just need to click on it). To do this for all your future maps, just click the 'Go Advanced' box at the bottom of the box in which you type your message, and then scroll down to the 'manage attachments' box. The rest is pretty self explanatory.
All the best