Congratulations! Owning an original piece of art is an achievement.
The first step is to outline what you are hoping to achieve, the very purpose of the piece and manage the expectations of the artist and the client, discuss timescales, mediums and size.
You will be issued with a short prompt list and terms and conditions to ensure that your requirements are met and the overall project runs smoothly to your specifications - size, medium, design and timescale.