Sara, what is your WHY for wanting a career transition? Write that down and keep it close! I bet you'll find it's well worth finding your courage and taking that risk.
And think about yourself 5 years from now. Would you rather be in your current field, or the new one you're considering? Those 5 years will pass either way, and you can make some amazing things happen in that time.
I just changed my course a bit too. You've got this!!