Whoa!!! Take a deep breath! Now..first...go stick that patch back on your arm to continue to quit smoking (worked for me :D )
Now...where are you in the block squaring up? I usually just find the center of my block (after I've pressed ..not ironed...) then I lay my square ruler on top finding the right dimension for 2 of the sides. For ex: if its a 6" block...I make sure that the 2 sides I am trimming are both 3 1/4" from the center. I trim, then turn the block around and do the same for the other 2 sides.
Now...anything else you need help with? I can't help you with the machine, but getting the instruction book for it would help. You can start a thread about it and I know someone on the board can help you.
Good luck and breath...and have fun!