Alpha sheets can now be added to games via the edit option in the alpha sheet display. In addition, statblock embedding should also work for the [sb=show][/sb] tags. Any problems, please post in experimental features with links to the sheet and the game.
As the peeps above have said, go to the Game Ads, look for a game which appeals to you and let them know you're new to MW ... you'll find pretty much everyone from the GM down will give you a hand. Of course the HELP section is also brilliant, especially helpful are the bbcodes, which allow you to do "fancy" stuff in your posts, found here: