Congratulations on getting certified. To answer your question – put your certification to use & start working. If you’re starting out at a gym – introduce yourself to members and start offering useful advice to them – that should help you get clients. Good luck Armand.
Being certified shows you are serious, hopefully it’s a Nationally Accredited Certification.
I suggest getting involved in your community:become a member of groups that interest you.
Make up flyers and distribute them locally.
Figure out your “niche” and create your own success.
Offer your services to small groups, this is more affordable for people.
Keep your CEC’s current and evolve as you go.