oK YOU DID NOT SCREW UP ANYTHING. trust me I do a lot of paper piecing and I still mess up,. don't go into this with the attitude of "I always screw up everything I do" if you do then you will for sure.
The most thing to remember is. Back to back always. Back of fabric to back of paper. I have taken out stitches way to many times., You will do fine. It is a learning thing trust me. have fun with this. OK?