Now, the first thing is that it's 99.9% likely I won't get a perfect first gig, and it probably definitely will not be paid because I cannot prove my competencies and/or I may not even be really good at building Wordpress websites or marketing them yet.

I would essentially fake it til I made it.

Instead of overwhelming myself looking at the big picture, which inevitably would stress me out and paralyze me, I will break down my tasks into phases. Actionable chunks. Then proceed forward.