Aside from knowing at least one member here earning around the amount I stated, it's really besides the point which is that there is no set rate.
Someone can help you work out your rate, with a tool like the freelance rate calculator, or you can google "work out your freelance rate" and there's a bunch of resources, but in the end the rate you set will be specific for you, coming from a combination of:
- Living expenses.
- Experience & skillset.
- Likes & dislikes.
- How fast you can do different things.
- How much you want to earn.
- How much you could realistically earn.
...and a variety of other factors. You may see how this is never going to be the same for any two people...