Here is a good how-to for uploading pics to the gallery: http://www.ramforumz.com/showthread.php?t=47017. The only problem I could see you having is the pic might be too big and need to be sized down. As for your avatar, just go to your User CP in the upper left corner. Click on that and then on the left you will see several options. The one you want is "Edit Avatar." Feel free to ask if you need any more help.
I keep trying to add pictures to a gallery so I can post some pics for everyone since I am new, but it keeps telling me that there is an issue with the website. Am I doing something wrong? Also, how do I get a pic over on the left side of my message. Like where some people have question marks? Thanks for any help.