I have made 2 DWR and I hope to make more. I have Shar Jorgenson's templates and I agree her's are the clearest. I don't recall having pressing problems at all. I just pressed however would make the blocks flattest and let the fabric do what it needs to do
I agree with Kitsie about making a block from scraps. I did that and I found it to be a great relief and confidence booster