QuiltE

Ditto to drafting it out first ... the graph paper will help you do your proportional sizings.
Just be sure to remember to allow the seam allowances in your calculations.

..... When stitching together, I would probably do some partial seams to avoid extra seams.
It really is not that hard to do them ... just a bit of patience for the first couple and then
you will see how easy they go together.