QUESTION: I keep starting novels but can't seem to finish them because I can't figure out how. Help!
Writing isn't just inspiration. A novel involves a great deal of planning, thought, and preparation. Those who just write instead of doing some form of plan or outline are more likely to be unable to finish a novel, or their novel falls apart.
Learn how to make that plan, if not an outline.
To do this, read books on writing. Most are one-size fits almost nobody, but you may eventually stumble on the one idea or method that gives you an "ah ha!" moment.
Mine was Ben Bova's WRITING SCIENCE FICTION THAT SELLS which helped me understand the relationship between plot and character. It's a good book even if you don't write science fiction. (It's been republished under a number of names.)
Find a good teacher. The Internet has some wonderful online teaching sites.
Ask questions at blogs like this one.
And when you find novels you really like, reread them and try to figure out what the writer did and how the novel was structured.
Take the book apart by writing a short description of what happens in each chapter so you can better see the structure.
Don't give up if you really want to tell the story. Eventually, you will figure out how to finish it if you work at it.