I haven’t been getting direct orders from my gigs, but people have been approaching me with their needs, and I often send them a custom offer. Do I start doing the work they asked me to, send it them then they pay, or do they complete the transaction first then I start my work?
There’s no difference in the process for you as a seller. You send your potential clients a custom offer and they have to option to either accept or deny that offer. If they accept, it shows up on your To Do list as any other purchase. You then finish the work, deliver and receive the money.
Hope this helps.