In which I change the story line

URGH! I can't seem to get a story line to play out. And I can't figure out if I want to write in first person, or third person. Somehow, writing in first person seems to come a bit easier. But writing in third person is a good way to grasp the feelings of other characters. Can I split it up? I have seen books where there is some in first person, and other parts in third person. And it worked fine. I think I am just going to start over.