Not a lawyer but as a citizen I generally understand that the courts expect demands from court parties to be met.

If meeting the court's (or court parties') demands costs you something you are generally entitled to charge them for it, within reason and with justification.

As a hobbyist therefore putting a service offering page together with your preferred rate probably helps establish the nature and parameters of any such service.

Bill rates / piece rates, especially, and setting up bounds of what is reasonable to expect, in proportion to your gig and your intended effort level.

Quantity and price tiers, turnaround times, what will be included in the deliverable, how it will be delivered, SLAs, etc.

Whatever defines your service, esp as it relates to the types of requests you end up getting.