I think what happened was that I forgot to subscribe to your thread, and I missed it in the updates. <.> My deep apologies.
Well said, let's go over your points.
-Knowledge is always a great thing! To know more, experience more, these are all great factors of life that we should never get enough of. Learning Doton is no exception, and it is a very creative element, alongside Water, so I hope you remember to have fun with your jutsus.
-Earth, as you stated, tends to be more defensive. After all, we do stand on earth, haha, and we can do a lot with it just by manipulating it in ways we see fit.
Actually, about your restrictions, the only things that you can not use would be the actual lava and mud techniques. It's natural that if you add water to earth, there will be mud. When I use a Wind/Fire technique that is hot enough and close to the ground, it's logical that the ground should also start melting in lava. A lot of doing well in RP is just using your brain. ^_^
Now, let's first begin with the basics of Doton.
Place your hand upon the rock next to you...send your chakra through it, and get a feel of the element.
Tell me how you think Earth Chakra flows.