There are three ways to make money. Get a job, become a freelancer, or start a business. I'm sure you're familiar with the first. What separates two and three are how you sell and deliver the product.

I’m surprised to not see more information here on how to set a price.

Here’s a bottom up estimate:

(Desired annual salary +

Cost of benefits +

Cost of all taxes+

Cost of business expenses +

Cost of time off +

Fee) /

2000-ish hours =

Hourly billable rate