When I quit my job I joined freelancing platform (Malt and Comet because I used to live in France). I got my first well paying gig this way.

Then a friend of mine heard I had done a good job and asked whether I wanted to join him on other things, then I was set.

If your clients are happy they will offer more jobs, recommend you, opportunities will arrive.

I haven't had the need to look for a client ever since