AI Create – All About Interior Design

I have a BA in architecture, with experience in interior design. The question is, would I need to qualify in order to become a professional interior designer?
I live and work in the UK btw.
Thanks in advance for all your tips and advice.

I haven’t done any research or anything, so don’t come down on me too hard for asking.
My degree is in Architecture but I have always been more interested in interior & kitchen design, plus you don’t need a license to practice interior design in the US.
Any thoughts, resources?
And where do designers get those enormous design catalogues from? (think Candice Olson from Divine Design) Manufacturers?
Hi, I live in NY state. We don’t need one here, as far as I know.