I'm also a "wanna be" woodworker. For cracks like that I use a slow-setting CA glue (superglue). The new Gorilla brand superglue is made to be flexable when cured. I use the wedges as previously mentioned, plus I push the glue into the crack with air. If the crack goes all the way through the wood, a shopvac will help pull the glue into the crack. If it doesn't, a gentle blast of compressed air will push it in.