Start out by offering new clients no fee video chat for a few minutes and get to know them and establish trust and relationship.
Start out with a small fee and do a consultation to fully immerse yourself with your client's needs and expectations for your expertise. This will allow a clear relationship to be established where your client understand this will be an exchange of professional services and not take your time for granted.
Clearly define your payment system as easy as possible with a great value proposition of why you are charging what you are charging. Some easy strategies we have seen work are