Hello! You must be new here because I haven't seen you around, but welcome!!
How you get an avatar:First, you have to find an image you like and save it as a picture or copy the image URL (the text/code in the long, thin bar at the top of the page. Ex: link
Then, if you click the UCP botton right below the Treetop Whispers banner at the top, you'll link to your profile. When you're there, click the avatar button, which will give you a few choices on how to upload your avatar. You can upload the image if it is saved on your computer by selecting the file after you click the "Browse" button. Or, you could just enter the link to the image in the "Upload an Avatar from your URL" text box. Then, click enter. If the picture is big, the coputer will automatically resize it for you. =D
How you join a clan:You have to ask Seedfur the almighty Admin of Treetopwhispers. Here's the link for more info:
Link to ClansWhat are prey points?:Prey points are special points you get for a certain event happening. You get a certain amount for posting a reply, posting a topic, friends you get, and other events. When you have enough Prey Points (PP) you can spend your points at the Prey Points Store, where you can get lots of cool things:
Link to PPShopOh, and I got your PM too, hope this helps!! ;D
Although I have to say that this isn't the right place for this. It should be moved to the Help section of the Forum-related things. But no worries! A mod or admin won't mind if you ask to move it! =)