Any advice on transfering printouts onto the plywood?
You don't have to transfer the drawings if you can print them out full size, you can simply glue the printouts to the plywood, wait for the glue to dry and make your cuts. Then soak, scrape or sand the paper pattern from the plywood.
Sticking paper patterns directly to the wood is actually quite a standard way of doing some jobs in woodworking.
If you can't print the pattern out at full size then probably the best way to transfer the drawing to the plywood is via gridding. It's too difficult to explain this properly in words only so see the link below that shows the process more fully. But just to describe the process here in brief, you draw a grid of small square on the scale drawings, draw a grid of large squares on the plywood, then transfer your lines from the small squares to the large squares.
How to Scale Drawings Using the Grid Method on WikiHow.