best way to sell your service is to inlcude your samples or your Portfolio.
show them your experiences and Design so they can rely on your skills and negotiate with the payment for your work.
also. you are Offering Escrow service - This service should not be included to your Niche since you are having Financial Problem. you are not trustworthy enough IMO.
I think being honest from the beginning is important, escrow service is based on trust and reputation, as for a portfolio I am co designer of this website
http://tunisietech.store/We stopped at that point when we realised we can't implement a payment method, not us the creators, but our banking system in Tunisia is still from the 50's, one bank when I told them we want a plugin to process payments on our website thought we were trying to hack the bank and almost called security on us.
Anyway, thanks for the advice.
I think you can use one of Skrill, Neteller, Perfect Money, or Payoneer as your payment method, no? There are also some (anonymous) crypto payment processors like Blockonomics if fiat is not that important to you.
Or if none of those are options for Tunisia, you can make an online account at
The Kingdom Bank and pass KYC, then link any other payment method to that. (Note: US citizens are banned, pretty much everyone else is allowed though).