Ok so now that you've drawn out and scanned in your art how do you post it to the forum???
First you need to upload it to a photo server such as www.imageshack.com or www.photobucket.com or for a more basic simple one http://img223.exs.cx if you're having trouble doing this contact me and I'll help you out. Once you have it uploaded to the site it should give you a couple url's you can use. Simply copy those urls and paste them into the message body of your post using the "Img" or "URL" tags if you need to. Then post a caption explaining your work and any other information you feel to be relevent. Good luck
Is it safe ? Depends. You got a good HARDWARE firewall when you access the internet ? You keep your Windows (or other OS) updated ? Do you use proxies when you do things on the internet (HTTP, IRC, ect) ? Do you even leave it on the internet 24/7 ?