Hmmm, you might be interested in turning to Latin then. English isn't the base.

If you take the base Latin words and then like how kanji are built off radicals you might be on to something.

Not inventing kanji compounds but rather using latin and it's conterpart radicals to invent a kanji.

kanji came from turtle shell cracks and picture graphs. So why not just make a few more along the lines of Latin?

You should also look into the Klingon language. There are a bunch of sites that go into detail about Kligon and the language used in the Lord of the Rings along with how you go about making your own language.

cheers