Use the major job hunting site for your location.
Look for people looking for entry level ppc execs ideally where you can tell it is the business putting up the ad rather than an agency.
Submit your CV with your business labelled as Freelance Consultant. Write a legit cover letter for the role.
In the interview call say you are freelance and remote only. The benefit of hiring you is they get someone with way more experience than they would get at their advertised salary, no built in costs like pensions/sick days etc, no HR contracts, only trade off is you are remote and part time vs full time in office.
Pitch at slightly less than the advertised role.
Some companies want in house full time even if the person they'd get is a useless noob.
Occasionally, a proper business person will see that a skilled freelancer even part time for less is a better deal for better results.
Good luck!
