Once you have a good grasp on the basics of the Burmese script, you can plunge into learning the literary Burmese.
This book uses actual Burmese texts to build your vocabulary and knowledge of the literary forms not generally used in the spoken language.
Unless you are able to devote full-time study to this book, I highly recommend you gradually and patiently assimilate the material. I now try to read something in Burmese almost every day, even if only for five minutues, and sometimes up to an hour (and sometimes I have to look up most of the words in the sentence!!). With a regular attention to reading, I've found that now the material in this book can be learned much more quickly.