Starting a new job after unemployment

Hello! I just recently discovered & joined life coach scholars. I have been unemployed for over 2 years. My job laid me off & shortly after I was diagnosed with breast cancer. It took over a year, to get through treatments/surgeries. Over this last 2021 year, it has been impossible to gain employment. I decided to focus on my emotional & physical health. I completed my yoga training & am very interested in life coaching as a potential career for the long term. However, my finances are a mess, I have a lot of debt that I need to pay down. Just recently, I have signed on as Vice President, General Manager Sales & Marketing for a consumer goods business (luxury goods) to begin January 2021.
I have a lot of trepidation about taking this job on. As soon as I signed the contract I felt instant fear & self doubt set in. I don’t know if I can take this on. It’s been awhile & I don’t know if I still have what it takes. where do I start? Would love to discuss with a business coach as well.