There is nothing that says you have to continue working with those blocks right now. It is ok to set this project aside and continue your quilting journey with a different project, one that you enjoy working on. After you have gained more experience, you can try it again, if you want. I like to use a plastic art box from Michaels to store the pattern and fabric for a specific project, on sale for about 3 dollars often and it will be there for you later. Or you could just enjoy looking at Tula's book as an art piece and use the fabric for something else. I'm just throwing this out there as another possibility since the idea of trying to increase the size of intricate blocks, even with all the great suggestions you've been given, really gives me a headache
And welcome to the board!