To get into many companies you have to have connections within the industry as well as qualifications.
As said not easy so my son set up company and self-employment had to put up the money for everything to create and film an ad that the client likes.
The companies or TV stations won't give money first they only pay when the work is accepted and finished.
So in beginning it was hard and when covid came it was tough but he had established clients by then so now has got it sorted and get by doing something he enjoys.