It keeps saying I cant

request any shops myself because I am

assigned my limit of shops but I’m not signed up for anything.

I would send an email to the scheduler listed in the shops you are trying to request to see if they will assign you or if there are any requirements you do not meet. They have all been quite prompt and friendly in my experience when I've needed to reach out. Also check that you have all of your required profile information filled out and MSP agreements signed for the company you are requesting the shop for.

Good luck!