Please understand I am writing this kindly -- the issue is that you are not an experienced enough freelancer.

You can compensate for this if you have the marketing and client management skills to get an aspirational rate, but if you don't, you need to be so good that you not only can see your way through a project in a conversation but see the potential traps and talk through them with the client confidently.

I believe that you can get this experience quickly -- good luck!