Welcome to FH, glad you're enjoying the game! ^^
1. Try changing your rendering system to Direct3D9 if it's OpenGL atm (or the other way around). You can do this as the game is opening (the white box)
2. Profile > Forum Profile Information > Put in the link of the image you want as your icon/avatar or select one by clicking "Browse" from your computer (Remember to reselect the choice bubbles!)
3. You can find out about upcoming events and other things by snooping around the forums. Some other things to do are chatting on Skype with your FH friends, chatting or derping around ingame, climbing Ascension Island, roleplaying, making presets, exploring, or downloading custom maps and mods to expand your FH experience ^^ There's a lot to do!