Buy a laminated flat bow, second hand, and see whether you enjoy shooting it. If you find that you enjoy it, then start looking at making your bow. If you do not like it, then you will have far less invested in the process, and a bow that you can sell on. Or maybe you could borrow such a bow.
I started making bows because I thought I was too poor to buy one. Turned out I spent a good deal more on materials and tools than I would have spent on a good bow, and while my first bow worked, I wasn't satisfied. 10 or 12 bows later, only the last one was getting where I wanted, but still not quite right. (they were of several different styles) That is a danger. The other is that having spent a lot of time and energy making your first bow, you find that it doesn't shoot satisfactorily for you. The difference coming from your compound could be significant. Some of the difference will be the straight bow, some the wood bow, some your skill in making the bow.
The Greenland book is good. I like the Traditional Bowyer's Bibles (you would use Vol1 & 2) but they quite technical...maybe overly-thorough would be a better description. Tim Baker, who wrote the Design and Performance chapter built 600 bows from all kinds of wood in all kinds of shapes to separate fact from fiction about bow performance. I am an engineer, and that kind of attention to detail was a great attraction, but it isn't for everyone.
If your friend has a bandsaw, then I would recommend a flat ring hard maple or ash board around 2" thick, try to get knot free, a wood rasp (cabinet makers rasps are nice), a coarse file, chainsaw round file, card scraper and perhaps a spokeshave. Using the bandsaw to reduce the board to a bow blank shape.
Best of luck.