Hi Charles,
I would suggest having someone assess and maybe edit what you’ve written so far. After all, you’ve started, and a neutral opinion may help you to overcome your current block.
Hiring a ghostwriter is an option you can consider but only as a last resort. You would have to spend a lot of time explaining the plot and characters to her/him. Plus, you would incur costs. If you’re lucky, you’ll find someone who can mimic your writing style and complete the novel for you. Finding someone who can, may not be that easy, so I’d veer towards overcoming your block.
Best of luck!
Anita