I fixed it by pressing delete and f (make face) lots of times, other than that I can't really explain. It takes a bit of practice, but you'll get there if you want to.
The thing to the left is the outliner, it gives a nice overview of what you've created. Lookup a tutorial about splitting the blender window.
Armatures do no show up in darkbasic pro as geometry, however getting the animation to work has proven to be a real pain.
I suggest you try and make 2 cubes and 2 bones, animate it and try to get it to work in dbp. Use the search function if it wont.