Damn, how did I do so crappy in the draft........... All I got are offensive defenseman, and goaltending. Anyone wanting to trade a forward for an offensive defenseman?

Adjusting your line is easy. On any given day, the column of that day's respectable date (on the right) will tell you who's playing. Make sure that player is put into their position, but selecting RW, LW, C, D, UTIL, (or whatever the player's position is) rather than BENCH. Switch with a player who isn't playing that day, but selecting BENCH for a player who's team isn't playing.