When I started freelancing, I did extremely cheap jobs because I didn't have experience and didn't know better. I did what you are currently doing, I went online to find answers. And the answer is, there are no fixed rate. The rate you are seeing, is perfectly reasonable for someone who charges this rate.

At some point, my fee was $40 an hour. I freelanced through a 3rd party who found gigs for me, and took their cuts. One day, I found out that they charged these companies $100 in some cases, while I was still only getting $40.

If that's how much I was worth, then it would be perfectly reasonable for me to charge just as much.

If you want more details, here is the full story: https://idiallo.com/blog/how-much-do-you-charge-for-your-wor...