i gotta be honest, the chances of becoming a plus-sized SG seem well, slim at this point. Suri and a few others have made it work for them, back when SG was more aggressively focused on alternative women; nowadays they seem to be promoting their own favorite women repeatedly. still, the community as a whole is quite welcoming to plus sized women even as they are to itty-bitty-titty girls... so get involved, explore some of the groups and contact some SGs directly for advice!