Kevin-
Just go with what feels right. Try starting off woth your gaurd. Go for a simple teardrop shape and let everything else flow from there. Keep looking at the blade shape and leat that guide the overall shape of things. Pick one of the woods you have on hand. Drill it and burn it onto the tang once you have the gaurd made. Again, going with what feels good to you, rasp and sand that baby to shape.
You can add a buttcap of the same material you made the gaurd out of and peen the end of the tang to hold it all together.
The main thing is doing what makes you happy. If you're proud of how it turns out, chances are that someone else will be, too.
Incidentally, I saw your first knife somewhere else. You're getting better. Keep it up!