Haven’t done many tutorials, so please be forgiving - actually, it’s not a complete tutorial. Just trying to explain the construction. 
I do lots of these purses, tending towards vintage games, albums & books (and once, the commemorative menu from the Blue Bayou at Disneyland when they “Johnny Depp’d” up the ride.). Each one is different, as the sizes depend on which parts I want to highlight.
This one was from a 1940s album folio. Great front cover; but, blank back cover. I have a heavy duty paper cutter and used that to cut one of the records for the back. I used a piece of gameboard for the bottom. Front and sides cut from front cover. Front and back are cut to same size. Sides are cut to preferred width and same height as front/back. Bottom is same length as front/back and same width as sides.
The outside of each piece is covered in iron on vinyl. Holes are punched with a cropodile.
I ”measure” lacing by starting at one corner of front and measure down the side, across the bottom, up the other side (like a U shape). Then I run it around all four sides of the bottom. Finally, double that length. (I know that’s not clear, don’t worry, if you get it wrong, you can just tie a knot and keep going!).
Leaving a long tail, tie a knot in one end of the lacing. I like to start at a top corner on the front, stabilize with an extra stitch and then start lacing down one side. When I get to the bottom, I add the bottom piece on and lace front to back on the bottom. I do every other hole and then come back to the front. Then I attach front to bottom. When I get to the last hole on the bottom, then I add I. The second side piece the same way as the it’s up the front to the top. Sins where the back gets added. From there, it’s easy to see which way to go. If all goes well, you’ll end up at the original knot. Here, I undo the knot and tie the two ends together. I secure them with E-6000.
The lining is the dimensions of the inside plus a healthy seam allowance. I leave some extra at top and bottom so I don’t have to worry about raveling. Sew the side seam and another along the bottom. I do boxed corners the width of the bag. The top edge is sewn very close the the edge and catches the handles. Lining is glued in with E-6000 at top edge and left to cure overnight.
And that’s about it!
