My suggestion is that you NOT allow yourself to rip out anything until the next day. It is totally amazing how much better things look the "next day"--what looks huge the day you do it, fades with time (and our focus) By "tomorrow" we are able to look at the whole, and not focus on the "mistake" we feel we have made.
And another thing--let the others know this is your first try. Quilters are helpers--they will encourage you. Do stay with the class. You will be glad you did.
Happy quilting! (Remember, it's suppose to be fun.)