"Instead of falling behind, I want to take off and show I can do this for myself"

I spent 20+ years in Retail Management. I traveled across the country with this job. Then i became a stay at home mom. for the last 16 years. I currently work part-time as a marketer. I need to get myself back. I started a 12-week program to learn Digital Marketing from home. It is kicking my butt. I didn't realize all of the digital things I didn't know or understand. I feel so old. I am going to change this. Instead of falling behind, I want to take off and show I can do this for myself. I am not ready to be put out to pasture.