That's pretty good work, for a first try. You should have seen my first pair of mocs.
I'm new here, but I have made several pairs of mocs, using light buckskin to heavy moose and buffalo, made from the pattern the page at the link. The moose and buffalo leather was bought, BTW.
http://www.southernindiandept.org/mocpattern.htm An outer sole, reaching about 3/4" up the side of the moc, was glued on with a generous amount of rubber cement, then stitched on around the edges.
The rubber cement provides a nearly water proof sole, in most weather.
I have found that walking in mocs requires a different style of walking. Short choppy steps, especially when walking up hill or down hill, will prevent most falls, even in mud or wet leaves.
Li'ljohn