Optimizing my YouTube channel and website for future clients to hire me

As a self-employed video editor in Germany, I try to draw customers' attention to me and my services via my website and my YouTube channel.
The YouTube channel (second channel) serves not only as a portfolio with projects, but also as a test channel, in order to be able to offer my customers an additional feature in the area of channel optimization later.
I am still in the test phase - for almost 2 months.
The website is of course there so that you as a customer can first check my references and testimonials and what prices I take.